Description
The stock piston in your WR450F or YZ450F limits peak performance and durability under aggressive riding conditions. The Wiseco PK1359 replaces it with a precision-forged unit that delivers measurable gains in horsepower and torque while maintaining the thermal stability required for sustained high-RPM operation. If you’re serious about maximizing engine output without sacrificing longevity, this piston kit is the foundation every build needs.
Wiseco’s high-silicon aluminum composition resists expansion at elevated temperatures, keeping ring gaps consistent and combustion sealing tight lap after lap. The optimized dome profile enhances flame travel through the combustion chamber, translating directly to stronger power delivery across the RPM range. Combined with the precision-forged construction, you get a piston that handles the punishment of competition or trail riding without compromise.
- Fits: YZ450F, WR450F (2010-2015)
- Bore diameter: 95mm
- Compression ratio: 12.5:1
- Material: High-silicon aluminum
- Construction: Precision forged
- Dome design: Optimized combustion
- Includes: Piston, rings, pin, clips
- Installation: Requires standard top-end service
- MPN: PK1359
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