The WISECO Piston Kit, 77.00 mm, is developed to provide dyno-proven power gains for select Yamaha YZ250F, YZ250FX and WR250F applications. Its high-compression 14.5:1 design is intended to maximize torque and throttle response, while the dome design improves flame travel for efficient air and fuel burn. Distributor part number: 09105076. Manufacturer part number: RE812M07700.
The piston features an asymmetric skirt design for improved wear and even loading on the major thrust skirt. It is 100% billet machined for strength-to-weight performance and optimized fit, with a precision-fit ring and custom-lapped compression ring for improved power. A DLC-coated piston pin helps reduce friction and improve scuff resistance, while enhanced pin oiling supports lubrication and reduced friction. The pressure seal groove helps reduce ring lifting and power loss, and the ArmorGlide® skirt coating supports quieter operation and improved scuff resistance. The kit includes rings, pin and circlips and is made in the USA.
Vehicle fitment: 2015 and 2016 Yamaha YZ250FX; 2014, 2015 and 2016 Yamaha YZ250F; and 2015 and 2017 Yamaha WR250F.
Features:
- 77.00 mm piston kit for select Yamaha YZ250F, YZ250FX and WR250F applications
- High-compression 14.5:1 design for increased torque and throttle response
- 100% billet machined construction for strength-to-weight performance and optimized fit
- Asymmetric skirt design promotes improved wear and even loading on the major thrust skirt
- Custom-lapped compression ring and precision-fit ring support improved power
- DLC-coated piston pin helps reduce friction and improve scuff resistance
- Enhanced pin oiling supports lubrication and reduced friction
- Pressure seal groove helps reduce ring lifting and power loss
- ArmorGlide® skirt coating supports quieter operation and improved scuff resistance
- Includes rings, pin and circlips
- Made in the USA
Fitment:
2014 Yamaha YZ250F
2015 Yamaha WR250F
2015 Yamaha YZ250F
2015 Yamaha YZ250FX
2016 Yamaha WR250F
2016 Yamaha YZ250FX
2017 Yamaha WR250F