{"title":"Cylinder Kits","description":null,"products":[{"product_id":"standard-bore-cylinder-kit","title":"Cylinder Works Standard Bore Cylinder Kit (422-50014K02 \/ CW50014K02) | KTM \/ Husqvarna \/ GasGas 125 (2018-2023)","description":"\u003cdiv class=\"container\"\u003e\n\u003cdiv class=\"markdown markdown-main-panel enable-luminous-fast-follows enable-updated-hr-color md-content stronger tutor-markdown-rendering\" id=\"model-response-message-contentr_59192d5ca0d991fa\" dir=\"ltr\"\u003e\n\u003cp\u003eComplete high-performance standard bore cylinder kit engineered to deliver a comprehensive, ready-to-install top-end refresh for modern high-revving two-stroke motocross and off-road engines. Features a premium cast aluminum cylinder finished with a durable nickel silicon carbide (NSC) electroplate bore and diamond honed to exact specifications, paired with a matching Vertex piston kit, top-end gaskets, and wrist pin bearing to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive racing conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs \u0026amp; Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number:\u003c\/b\u003e 422-50014K02\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Part Number:\u003c\/b\u003e Cylinder Works CW50014K02\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eKit Type:\u003c\/b\u003e Complete Standard Bore Cylinder, Piston, Gasket, and Bearing Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBore Size:\u003c\/b\u003e Standard (54.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial \u0026amp; Construction:\u003c\/b\u003e Cast aluminum cylinder with nickel silicon carbide plating, matched with a Vertex #23928 piston\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTwo-Stroke Vehicle Fitment\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"horizontal-scroll-wrapper\"\u003e\n\u003cdiv class=\"table-block-component\"\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003cdiv class=\"table-block has-export-button new-table-style has-scrollbar is-at-scroll-start\"\u003e\n\u003cdiv class=\"table-content md-content\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eMake\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eEngine Type\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eYear Range\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eKTM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125 SX\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2018–2022\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eKTM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125 XC\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Cross-Country\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2021–2022\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHusqvarna\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTC 125\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2018–2022\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eGasGas\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMC 125\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2021–2023\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"table-footer hide-on-print hide-from-message-actions\"\u003e\n\u003c!----\u003e\u003c!----\u003e\u003cbutton class=\"mdc-icon-button mat-mdc-icon-button mat-mdc-button-base mat-badge mat-unthemed mat-badge-overlap mat-badge-above mat-badge-after mat-badge-small mat-badge-hidden ng-star-inserted\"\u003e\u003cspan class=\"mat-mdc-button-persistent-ripple mdc-icon-button__ripple\"\u003e\u003c\/span\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003cspan class=\"mat-focus-indicator\"\u003e\u003c\/span\u003e\u003cspan class=\"mat-mdc-button-touch-target\"\u003e\u003c\/span\u003e\u003c\/button\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003e\u003cstrong\u003eTSO Garage Note\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThere's the updated revision for the later second-generation carbureted Austrian 125 block. While the earlier 2016–2017 kits handled the introductory layout, part number \u003cb\u003e422-50014K02\u003c\/b\u003e picks up right where they left off to cover the \u003cb\u003e2018–2022 KTM\/Husqvarna\u003c\/b\u003e and \u003cb\u003e2021–2023 GasGas\u003c\/b\u003e variants. Bundling the correct Vertex piston configuration, gaskets, and wrist pin bearing, it drops straight into the crankcases without machine work, making it an efficient way to restore peak compression and crisp throttle snap.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!----\u003e\n\u003c\/div\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553863487767,"sku":"422-50014K02","price":1187.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/efed-6a56a0c06e419.jpg?v=1785216380"},{"product_id":"standard-bore-cylinder-kit-1","title":"Cylinder Works Standard Bore Cylinder Kit (422-50014K01 \/ CW50014K01) | KTM 125 SX \/ Husqvarna TC 125 (2016-2017)","description":"\u003cp\u003eComplete high-performance standard bore cylinder kit engineered to deliver a comprehensive, ready-to-install top-end refresh for modern high-revving two-stroke motocross engines. Features a premium cast aluminum cylinder finished with a durable nickel silicon carbide (NSC) electroplate bore and diamond honed to exact specifications, paired with matching top-end components to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive racing conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs \u0026amp; Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number:\u003c\/b\u003e 422-50014K01\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Part Number:\u003c\/b\u003e Cylinder Works CW50014K01\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eKit Type:\u003c\/b\u003e Complete Standard Bore Cylinder, Piston, and Gasket Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBore Size:\u003c\/b\u003e Standard (54.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial \u0026amp; Construction:\u003c\/b\u003e Cast aluminum cylinder with nickel silicon carbide plating, matched with Vertex #23928 piston components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTwo-Stroke Vehicle Fitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eKTM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125 SX\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2016–2017\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHusqvarna\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTC 125\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2016–2017\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eTSO Garage Note\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eSpot on—sharp eye catching that. The official manufacturer data restricts part number \u003cb\u003e422-50014K01\u003c\/b\u003e strictly to the \u003cb\u003e2016–2017\u003c\/b\u003e models (utilizing the specific Vertex #23928 piston configuration). Trying to cross-pollinate this casting into later model years will cause layout and port timing mismatches. Always verify your exact production year before teardown to guarantee a correct match.\u003c\/p\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553865519383,"sku":"422-50014K01","price":1187.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/4175-6a56a18fdecfa.jpg?v=1785216384"},{"product_id":"standard-bore-cylinder","title":"Cylinder Works Standard Bore Replacement Cylinder (422-50014 \/ CW50014) | KTM \/ Husqvarna \/ GasGas 125 (2016-2023)","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003eHigh-performance standard bore replacement cylinder engineered to restore factory performance and reliability for modern high-revving two-stroke off-road and motocross engines. Cast from high-grade aluminum and finished with a durable nickel silicon carbide (NSC) electroplate bore. Diamond honed to exact specifications to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive racing conditions.\u003c\/p\u003e\n\u003ch3\u003eSpecs \u0026amp; Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number:\u003c\/b\u003e 422-50014\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Part Number:\u003c\/b\u003e Cylinder Works CW50014\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComponent Type:\u003c\/b\u003e Standard Bore Replacement Cylinder (Cylinder Only)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBore Size:\u003c\/b\u003e Standard (54.00 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial \u0026amp; Construction:\u003c\/b\u003e Cast aluminum with nickel silicon carbide plating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTwo-Stroke Vehicle Fitment\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eKTM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125 SX\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2016–2022\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eKTM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e125 XC\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Cross-Country\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2021–2022\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHusqvarna\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTC 125\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2016–2022\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eGasGas\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eMC 125\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2021–2023\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eTSO Garage Note\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eA dependable standalone cylinder replacement for modern Austrian 125cc powerplants. When deep scoring, thermal damage, or worn-out plating ruins your original bore, this direct-fit replacement cylinder saves you the wait and hassle of stripping and replating a core, giving you exact factory port timing and rugged durability for the track or trail.\u003c\/p\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553866076439,"sku":"422-50014","price":934.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/9ccb-6a579ee8c3dab.jpg?v=1785216388"},{"product_id":"standard-bore-cylinder-kit-2","title":"Cylinder Works Standard Bore Cylinder Kit (422-50013K01 \/ CW50013K01) | KTM 85 SX \/ Husqvarna TC 85 \/ GasGas MC 85 (2018-2025)","description":"\u003cp\u003eComplete high-performance standard bore cylinder kit engineered to deliver a comprehensive, ready-to-install top-end refresh for high-revving junior two-stroke engines. 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Instead of piecing together separate gaskets, rings, and pistons or waiting weeks for a replating service, this complete kit bundles a premium nickel silicon carbide-plated cylinder with a matching Vertex piston, top-end gaskets, and wrist pin bearing. It delivers exact factory port timing, correct clearances, and rock-solid reliability to keep high-strung junior engines pulling strong on the track or trail.\u003c\/p\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553867256087,"sku":"422-50013K01","price":988.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/5b8f-6a579fa31fca5.jpg?v=1785216393"},{"product_id":"cylinder-kit-72mm-std-bore","title":"Cylinder Works Standard Bore Cylinder Kit (422-50011K \/ CW50011K01) | KTM \/ Husqvarna 300 (2020-2023)","description":"\u003cp\u003eComplete high-performance standard bore cylinder kit engineered to deliver a comprehensive, ready-to-install top-end refresh for modern fuel-injected two-stroke off-road engines. 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Instead of piecing together separate gaskets, rings, and pistons or waiting weeks for a replating service, this complete kit bundles a premium nickel silicon carbide-plated cylinder with matching top-end components. 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Features a premium cast aluminum cylinder finished with a durable nickel silicon carbide (NSC) electroplate bore and diamond honed to exact specifications, paired with matching top-end components to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive racing conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs \u0026amp; Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number:\u003c\/b\u003e 422-30009K\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Part Number:\u003c\/b\u003e Cylinder Works 30009-K02\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eKit Type:\u003c\/b\u003e Complete Standard Bore Cylinder and Piston Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBore Size:\u003c\/b\u003e Standard (48.50 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial \u0026amp; Construction:\u003c\/b\u003e Cast aluminum cylinder with nickel silicon carbide plating, matched with high-strength forged or cast piston components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTwo-Stroke Vehicle Fitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eKawasaki\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eKX 85\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Junior Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2001–2013\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eKawasaki\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eKX 85 Big Wheel\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Junior Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2001–2013\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eTSO Garage Note\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe ultimate hassle-free solution for bringing a junior Kawasaki 85 back to life. Instead of piecing together separate gaskets, rings, and pistons or waiting weeks for a replating service, this complete kit bundles a premium nickel silicon carbide-plated cylinder with matching top-end components. It delivers exact factory port timing, correct clearances, and rock-solid reliability to keep high-strung mini-moto engines pulling strong on the track or trail.\u003c\/p\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553877872919,"sku":"422-30009K","price":662.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/4764-5a590040db858.jpg?v=1785216427"},{"product_id":"cylinder-kit-bb-72-00-5-6-yam","title":"Cylinder Works Big Cylinder Works 72mm High-Output Big Bore Kit (422-21009K \/ 21009-K01) | Yamaha YZ250 (1999-2025)","description":"\u003cp\u003eComplete high-performance big bore cylinder kit engineered to significantly increase displacement, torque, and peak horsepower without requiring case modification. Features a premium cast aluminum cylinder with an enlarged 72.00 mm bore (+5.6mm over stock) finished in a durable nickel silicon carbide (NSC) electroplate. Paired with a matched, high-strength forged big bore piston featuring a hi-tech Molybdenum Disulphite skirt coating for accelerated break-in and extended service life, alongside a complete top-end gasket kit.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs \u0026amp; Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number:\u003c\/b\u003e 422-21009K\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Part Number:\u003c\/b\u003e Cylinder Works 21009-K01\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eKit Type:\u003c\/b\u003e Complete Big Bore Cylinder, Piston, and Gasket Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBore Size:\u003c\/b\u003e Big Bore (72.00 mm \/ +5.6mm over stock)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial \u0026amp; Construction:\u003c\/b\u003e Nickel silicon carbide plated aluminum cylinder with a T-5 heat-treated forged piston\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTwo-Stroke Vehicle Fitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYZ 250\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross \/ Big Bore\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1999–2025\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eTSO Garage Note\u003c\/h3\u003e\n\u003cp\u003eThe ultimate bolt-on engine modifier for YZ250 riders hunting for serious, tractive power across the entire RPM range. Bumping displacement up to a true 72.00mm big bore transforms the power delivery with hard-pulling torque down low and increased peak horsepower up top. Whether you are lugging through technical single-track trails, hooking up in deep sand dunes, or charging down long motocross straights, the extra bottom-end grunt pulls taller gearing with ease. Because the cylinder drops straight into the stock cases with no machine work required, it's an efficient way to unlock a whole new level of performance during a standard top-end rebuild.\u003c\/p\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553878921495,"sku":"422-21009K","price":1255.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/14a8-6a5e8392492e5.jpg?v=1785216430"},{"product_id":"cylinder-kit-66-40-std-yam-1","title":"Cylinder Works Standard Bore Cylinder Kit (422-20009K \/ 20009-K01) | Yamaha YZ250 (1999-2025)","description":"\u003cp\u003eComplete high-performance standard bore cylinder kit engineered to deliver a comprehensive, ready-to-install top-end refresh for legendary two-stroke motocross engines. Features a premium cast aluminum cylinder finished with a durable nickel silicon carbide (NSC) electroplate bore and diamond honed to exact specifications, paired with matching top-end components to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive racing conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs \u0026amp; Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number:\u003c\/b\u003e 422-20009K\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Part Number:\u003c\/b\u003e Cylinder Works 20009-K01\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eKit Type:\u003c\/b\u003e Complete Standard Bore Cylinder and Piston Kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBore Size:\u003c\/b\u003e Standard (66.40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial \u0026amp; Construction:\u003c\/b\u003e Cast aluminum cylinder with nickel silicon carbide plating, matched with high-strength forged or cast piston components\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTwo-Stroke Vehicle Fitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYZ 250\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1999–2025\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eTSO Garage Note\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe ultimate hassle-free solution for bringing a YZ250 powerplant back to life. Instead of piecing together separate gaskets, rings, and pistons or waiting weeks for a replating service, this complete kit bundles a premium nickel silicon carbide-plated cylinder with matching top-end components. It delivers exact factory port timing, correct clearances, and rock-solid reliability for the track or trail right out of the box.\u003c\/p\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553881510167,"sku":"422-20009K","price":842.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/d79a-6499e3b59a626.jpg?v=1785216448"},{"product_id":"cylinder-only-66-40-std-yam","title":"Cylinder Works Standard Bore Replacement Cylinder (422-20058 \/ CW20058) | Yamaha YZ250 (1999-2026)","description":"\u003cp\u003eHigh-performance standard bore replacement cylinder engineered to restore factory power and reliability for legendary two-stroke motocross engines. Cast from high-grade aluminum and finished with a durable nickel silicon carbide (NSC) electroplate bore. Diamond honed to exact specifications to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive racing conditions.\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs \u0026amp; Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number:\u003c\/b\u003e 422-20058\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Part Number:\u003c\/b\u003e Cylinder Works CW20058\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComponent Type:\u003c\/b\u003e Standard Bore Replacement Cylinder\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBore Size:\u003c\/b\u003e Standard (66.40 mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial \u0026amp; Construction:\u003c\/b\u003e Cast aluminum with nickel silicon carbide plating\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTwo-Stroke Vehicle Fitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYZ 250\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1999–2026\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eYamaha\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eYZ 250X\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Cross-Country\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2016–2026\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eTSO Garage Note\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eThe ultimate go-to solution for refreshing a tired or damaged YZ250 powerplant. Whether you are dealing with deep scoring, high-hour wear, or severe detonation damage, dropping in this nickel silicon carbide-plated cylinder saves you the downtime of a replating service while delivering factory-correct port dimensions and rock-solid reliability for the track or trail.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553881608471,"sku":"422-20009","price":645.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/422-20009.jpg?v=1785429100"},{"product_id":"cylinder-only-39-50-std-husq-ktm","title":"Cylinder Works Standard Bore Replacement Cylinder (422-50012 \/ CW50012) | KTM 50 SX \/ Husqvarna TC 50 (2009-2021)","description":"\u003cp id=\"p-rc_8b435bb1502d7c61-47\"\u003eHigh-performance standard bore replacement cylinder engineered to look and perform like stock while offering superior durability for high-revving junior two-stroke engines. \u003cspan class=\"citation-62 citation-end-62\"\u003eCast from high-grade aluminum and finished with a nickel silicon carbide (NSC) electroplate bore.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003cspan class=\"citation-61 citation-end-61\"\u003eDiamond honed to exact dimensions to ensure optimal ring seal, reduced friction, and maximum thermal efficiency under aggressive racing conditions.\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cstrong\u003eSpecs \u0026amp; Details\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eManufacturer Part Number:\u003c\/b\u003e \u003cspan class=\"citation-60 citation-end-60\"\u003e422-50012\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAlternative Part Number:\u003c\/b\u003e \u003cspan class=\"citation-59 citation-end-59\"\u003eCylinder Works CW50012\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eComponent Type:\u003c\/b\u003e \u003cspan class=\"citation-58 citation-end-58\"\u003eStandard Bore Replacement Cylinder\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eBore Size:\u003c\/b\u003e \u003cspan class=\"citation-57 citation-end-57\"\u003eStandard (39.50 mm)\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eMaterial \u0026amp; Construction:\u003c\/b\u003e \u003cspan class=\"citation-56 citation-end-56\"\u003eCast aluminum with nickel silicon carbide plating\u003csup class=\"superscript\"\u003e\u003c!----\u003e\u003c\/sup\u003e\u003c\/span\u003e \u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\u003c!----\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cstrong\u003eTwo-Stroke Vehicle Fitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMake\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYear Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eKTM\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e50 SX\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Junior Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2009–2021\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003eHusqvarna\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTC 50\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eTwo-Stroke Junior Motocross\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2017–2021\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cstrong\u003eTSO Garage Note\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp\u003eA top-tier replacement option when scoring, wear, or detonation destroys a junior mini-bike top end. Instead of dealing with the downtime and variable quality of replating a worn-out stock bore, this ready-to-bolt-on cylinder delivers exact factory port geometry and hard-wearing nickel silicon carbide plating to keep high-strung 50cc engines running strong race after race.\u003c\/p\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"CYLINDER WORKS","offers":[{"title":"Default Title","offer_id":54553883181335,"sku":"422-50012","price":434.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/0536-6499e4edec7c6.jpg?v=1785216461"},{"product_id":"1989-2001-honda-cr500-direct-bolt-on-performance-cylinder","title":"1989-2001 Honda CR500 Direct Bolt-On Performance Cylinder","description":"\u003cp\u003e\u003cb\u003eThe wait is almost over.\u003c\/b\u003e This is exactly what the big bore community has been needing. Stop paying huge amounts of money for worn-out used cylinders that require extensive repair work, or shelling out a fortune for NOS units that still leave you stuck with factory stock performance.\u003c\/p\u003e\n\u003cp\u003eExclusive to Two-Strokes Only, this is the very first entirely new, direct-replacement stock bore cylinder of its kind to hit the CR500 market. We kept the proven characteristics of the original Honda design and strategically modernized the rest to unleash its true potential. No hacking, no case grinding, no headaches—just improved performance and unquestionable reliability in a \u003cstrong\u003etrue bolt-on package.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhether you are rebuilding a blown top end or looking for the ultimate big-bore upgrade, this cylinder delivers modernized airflow and improved reliability without the need for extensive porting work.\u003c\/p\u003e\n\u003ch2\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cb\u003eWhat's Included \u0026amp; Optional Upgrades\u003c\/b\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch4\u003e\u003cb\u003eIncluded in the box:\u003c\/b\u003e\u003c\/h4\u003e\n\u003cp\u003e1. All-New CR500 Replacement Cylinder (STD 89 mm Bore) \u003c\/p\u003e\n\u003cp\u003e2. Top end gasket set \u003c\/p\u003e\n\u003ch4\u003e\u003cb\u003eOptional Add-Ons (Select from the drop-down menu):\u003c\/b\u003e\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cb\u003ePiston Kit:\u003c\/b\u003e Complete drop-in piston kit ready for installation.\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/twostrokesonly.com\/products\/1986-2001-honda-cr500-billet-cylinder-head-kit?srsltid=AU7gw4WODrsSspQ68TL6oz3gopZzt6xaPtc-0fuTf0BqdSuL8-iUrbRP\"\u003e\u003cb\u003eTSO Billet Cylinder Head:\u003c\/b\u003e Maximize cooling and performance with our custom billet head.\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTSO Billet Reed Spacer:\u003c\/b\u003e Optimize intake tract volume and throttle response.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTSO Billet Exhaust Flange:\u003c\/b\u003e A heavy-duty, leak-free upgrade over the stock cast flange.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cb\u003eStrategic Porting Evolution:\u003c\/b\u003e We kept what actually worked from the original factory porting and made critical improvements where they were needed most. The result is an incredibly reliable, highly versatile cylinder that puts out more power than any hand-ported OEM unit on the market, while retaining a good useable powerband.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eImproved Exhaust \u0026amp; Thermal Management:\u003c\/b\u003e Built around an improved single bridged exhaust port, this design maximizes flow while offering superior piston and ring support. We also engineered improved cooling at the top of the exhaust port duct to relieve thermal stress on the bridge, actively preventing the cracking commonly seen in bridged all-aluminum cylinders like the CR250.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eRugged Construction:\u003c\/b\u003e Cast from high-quality aluminum and finished with a low-friction Nikasil plated bore for unmatched heat dissipation, oil retention, and maximum longevity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTrue Direct Bolt-On:\u003c\/b\u003e Drops right onto your factory bottom end. Zero crazy case modifications, machining, or bike alterations are required. Bolt it down and ride.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUniversal Compatibility:\u003c\/b\u003e Build it your way. This unit is 100% compatible with all original (OEM) and aftermarket reeds, pipe flanges, cylinder heads, pistons, and top-end gaskets.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003e\u003cspan style=\"text-decoration: underline;\"\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable style=\"width: 100.048%;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cstrong\u003eFeature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003eFitment\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cspan\u003e1989–2001 Honda CR500\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003eBore Size\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cspan\u003e89.00mm \u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003eMaterial\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cspan\u003eAll-Aluminum Cast\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003eBore Coating\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cspan\u003eNikasil Plated\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003ePorting Style\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cspan\u003eOptimized Factory-Plus\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003eExhaust Layout\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cspan\u003eImproved Single Bridged\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003eThermal Management\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cspan\u003eUpgraded Exhaust Duct Cooling\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003eModifications Required\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\u003cspan\u003eNone (Direct Bolt-On)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 22.5256%;\"\u003e\u003cspan\u003e\u003cb\u003eCompatibility\u003c\/b\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 77.2306%;\"\u003e\n\u003cp\u003e\u003cspan\u003eAccepts all OEM \u0026amp; Aftermarket Top-End Components, replaces Honda 12100-ML3-680\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDESIGNED TO WORK WITH WOSSNER AND WISECO FORGED PISTONS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWiseco:  \u003c\/strong\u003e871M08900\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWossner:  \u003c\/strong\u003e8229DA\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"🏁Two-Strokes Only🏁","offers":[{"title":"No Thanks \/ No Thanks \/ No Thanks","offer_id":67634967838999,"sku":null,"price":1199.0,"currency_code":"USD","in_stock":false},{"title":"No Thanks \/ No Thanks \/ Yes","offer_id":67634967871767,"sku":null,"price":1254.0,"currency_code":"USD","in_stock":false},{"title":"No Thanks \/ Yes \/ No Thanks","offer_id":67634967904535,"sku":null,"price":1234.0,"currency_code":"USD","in_stock":false},{"title":"No Thanks \/ Yes \/ Yes","offer_id":67634967937303,"sku":null,"price":1289.0,"currency_code":"USD","in_stock":false},{"title":"Wossner \/ No Thanks \/ No Thanks","offer_id":67634967970071,"sku":null,"price":1391.0,"currency_code":"USD","in_stock":false},{"title":"Wossner \/ No Thanks \/ Yes","offer_id":67634968002839,"sku":null,"price":1446.0,"currency_code":"USD","in_stock":false},{"title":"Wossner \/ Yes \/ No Thanks","offer_id":67634968035607,"sku":null,"price":1426.0,"currency_code":"USD","in_stock":false},{"title":"Wossner \/ Yes \/ Yes","offer_id":67634968068375,"sku":null,"price":1481.0,"currency_code":"USD","in_stock":false},{"title":"Wiseco \/ No Thanks \/ No Thanks","offer_id":67634968101143,"sku":null,"price":1437.95,"currency_code":"USD","in_stock":false},{"title":"Wiseco \/ No Thanks \/ Yes","offer_id":67634968133911,"sku":null,"price":1492.95,"currency_code":"USD","in_stock":false},{"title":"Wiseco \/ Yes \/ No Thanks","offer_id":67634968166679,"sku":null,"price":1472.95,"currency_code":"USD","in_stock":false},{"title":"Wiseco \/ Yes \/ Yes","offer_id":67634968199447,"sku":null,"price":1527.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0687\/3818\/7543\/files\/tsocyl1_10344e31-0416-46b7-bd4d-20264f7acf48.png?v=1791131054"}],"url":"https:\/\/twostrokesonly.com\/collections\/cylinder-kits.oembed","provider":"🏁Two-Strokes Only🏁","version":"1.0","type":"link"}