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Cylinder Works Standard Bore Cylinder Kit (422-50011K / CW50011K01) | KTM / Husqvarna 300 (2020-2023)

Sale price $1,242.95

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Complete 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. 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 and top-end gaskets to ensure optimal ring seal, reduced friction, and superior heat dissipation under aggressive trail and racing conditions.

Specs & Details

  • Manufacturer Part Number: 422-50011K
  • Alternative Part Number: Cylinder Works CW50011K01
  • Kit Type: Complete Standard Bore Cylinder, Piston, and Gasket Kit
  • Bore Size: Standard (72.00 mm)
  • Material & Construction: Cast aluminum cylinder with nickel silicon carbide plating, matched with a high-performance Vertex piston

Two-Stroke Vehicle Fitment

Make Model Engine Type Year Range
KTM 300 EXC TPI Two-Stroke Off-Road / Enduro 2020, 2022
KTM 300 XC-W Two-Stroke Off-Road / Enduro 2023
KTM 300 XC-W TPI Two-Stroke Off-Road / Enduro 2020–2022
Husqvarna TE 300i Two-Stroke Off-Road / Enduro 2020–2023

TSO Garage Note

The ultimate drop-in solution for refreshing a high-hour Austrian 300cc powerhouse. Whether you are dealing with scoring from a ingested trail grit or simply logging routine maintenance on your TPI machine, this complete kit pairs a factory-matched nickel silicon carbide cylinder with a premium Vertex piston and gaskets. It eliminates the downtime and hassle of sending out a core for replating, restoring crisp fuel-injected throttle response and dependable bottom-end pull for technical single-track or open-desert loops.

Compatibility

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Year Make Model

Customer Reviews

Overall rating: 4.9 / 5 from 66 reviews.

Customer photo review of 1987-2004 Kawasaki KX500 Shift Fork Kit

Shipping was fast, the product is great! When you could still buy the shift forks from Kawasaki they came out of spec :-( These are in spec and far better quality than Kawi's forks. They are in the bike and vastly improved the shifting on this KX500 BEAST!!! Thanks Luke!

1987-2004 Kawasaki KX500 Shift Fork Kit

Customer photo review of 2017-2025 Honda CRF450r/CRF250r Billet Gas Cap

Unfortunately, the gas cap got scratched during shipping, but after a few friendly emails, the problem was resolved perfectly for both sides. Friendly service, quick solutions, absolutely reliable Top-notch shop👍

2017-2025 Honda CRF450r/CRF250r Billet Gas Cap

Customer photo review of 1988-2004 KX500 Billet Engine Cases

Amazing!!! Luke is so helpful. These cases are amazing and a direct fit of my old cases. All parts are equally made and not one is below my standards

1988-2004 KX500 Billet Engine Cases

The best machined pieces I have ever seen. I have wanted a two piece KX500 billet side cover for a long time and can't wait to install it. So trick!

1986-2004 KX500 Two-Piece Billet Side Cover

Very quick shipping, and super pleased with the quality of this stator cover! The anodized black blends nicely with the satin black powder coat on my KX500 engine.

1983+ KX500 Billet Stator Cover- Kawasaki Logo

Quality parts!!! Very happy with what I received for the money!! Fit and finish is top tier. Also happy to support a company who is helping keep these two strokes alive! I will be back for more parts soon!

Billet Rear Silencer Bracket | KX500 & KX250

Bearings were a perfect fit. A couple of shaft bearings were on back order, which I reicieved shortly after a majority of my orders arrived. Quality of everything is immaculate I would certainly do business with Luke again. I honestly wish I could have purchased the billet cases for my kx500af build after seeing the precision on the covers and head. Highly recommend TSO

1986-2004 Kawasaki KX500 Complete Engine Bearing Kit

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