Description
A worn or damaged piston directly impacts your WR450F or YZ450F’s compression ratio, throttle response, and overall reliability—especially under high-RPM racing conditions. This PROX piston kit restores OEM specifications with precision-machined components, ensuring consistent power delivery and durability across competitive and recreational riding. Replace your top-end assembly with confidence using a complete, ready-to-install kit engineered specifically for your Yamaha four-stroke.
- 96.95 mm bore diameter
- CNC-machined piston
- OEM-spec piston rings
- Wrist pin included
- Circlips included
- Complete kit assembly
- Yamaha WR450F compatible
- Yamaha YZ450F compatible
- Yamaha YZ450FX compatible
- Bolt-on installation
- Instruction sheet included
- Part number 01.2453.A
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