Billet Chromoly Power Valve Idle Gear - Kawasaki 59051-1205 | Heavy-Duty Upgrade for 1989-2004 KX500

End the frustration of rounded, worn-out factory components with the Two-Strokes Only Billet Chromoly Power Valve Idle Gear. Engineered as a permanent, high-strength upgrade for the original Kawasaki gear (Part No. 59051-1205), this component is CNC-machined from 4140 chromoly steel and heat-treated to ensure exceptional surface hardness and wear resistance.

The OEM gear is prone to tooth rounding under the intense vibration and thermal demands of the big-bore KX500 engine, leading to sloppy, inconsistent power valve actuation. This TSO billet chromoly replacement eliminates that point of failure, providing the rigid, stable gear engagement necessary for reliable power valve performance throughout the entire RPM range for your 1989-2004 model.

Vehicle Fitment

Kit Contents:

• One (1) CNC-Machined Billet Chromoly Power Valve Idle Gear

TSO Tip

When installing this gear, ensure that the entire power valve linkage mechanism is clean and operates freely. Because this chromoly gear is significantly harder than the original, perform a thorough inspection of the mating rack and associated actuator hardware to ensure the entire system is healthy and properly lubricated for smooth, bind-free operation.