The WISECO Piston Kit is a 77.00 mm high-compression piston kit developed for dyno-proven power gains in select Yamaha applications. Its asymmetric skirt design supports improved wear and even loading on the major thrust skirt, while the 100% billet-machined construction provides strength-to-weight optimization and precise fit.
The piston features a custom-lapped compression ring for improved power, a dome design intended to improve flame travel and air/fuel burn efficiency, and enhanced pin oiling for improved lubrication and reduced friction. A DLC-coated piston pin helps reduce friction and improve scuff resistance, while the pressure seal groove helps reduce ring lifting and power loss. ArmorGlide® skirt coating supports quieter operation and improved scuff resistance. The kit includes rings, piston pin, and circlips, and is made in the USA.
Distributor part number: 09105071. Manufacturer part number: RE802M07700. Fitment includes 2018 Yamaha WR250F; 2017 and 2018 Yamaha YZ250FX; 2016, 2017, and 2018 Yamaha YZ250F; 2019 Yamaha WR250F; and 2019 Yamaha YZ250FX.
Features:
- 77.00 mm piston kit for select Yamaha applications
- Asymmetric skirt design supports improved wear and even loading on the major thrust skirt
- 100% billet-machined construction for strength-to-weight optimization and precise fit
- Custom-lapped compression ring designed to support improved power
- Dome design intended to improve flame travel and air/fuel burn efficiency
- DLC-coated piston pin helps reduce friction and improve scuff resistance
- Enhanced pin oiling supports improved 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, piston pin, and circlips
- Made in the USA
- Manufacturer part number: RE802M07700
- Distributor part number: 09105071
- Fits 2018 Yamaha WR250F, 2017–2018 Yamaha YZ250FX, 2016–2018 Yamaha YZ250F, 2019 Yamaha WR250F, and 2019 Yamaha YZ250FX
Fitment:
2016 Yamaha YZ250F
2017 Yamaha YZ250F
2017 Yamaha YZ250FX
2018 Yamaha WR250F
2018 Yamaha YZ250F
2018 Yamaha YZ250FX
2019 Yamaha WR250F
2019 Yamaha YZ250FX