The WOSSNER Piston Kit in 76.95 mm size is designed for select Yamaha motorcycle applications. It features enhanced piston pin oiling slots, radial boss machining, and annular grooves to support improved wrist pin lubrication. The lightweight piston uses tight piston wall clearance for quieter engine operation, while the coated skirt helps reduce friction and supports break-in performance.
Additional design features include ring land treatment for improved ring seal and oil control, along with a double bridged forging design where noted. The kit includes the piston, rings, wrist pin, and pin locks. Distributor part number: 8942DA. Manufacturer part number: 8942DA.
Vehicle fitment includes the 2016, 2017, and 2018 Yamaha YZ250F; 2017, 2018, and 2019 Yamaha YZ250FX; and the 2018 and 2019 Yamaha WR250F.
Features:
- Piston Size: 76.95 mm
- Enhanced Oiling: Piston pin oiling slots, radial boss machining, and annular grooves support improved wrist pin lubrication
- Lightweight Design: Tight piston wall clearance supports quieter engine operation
- Coated Skirt: Helps reduce friction and supports break-in performance
- Ring Land Treatment: Supports improved ring seal and oil control
- Forging Design: Double bridged forging design where noted
- Kit Contents: Includes piston, rings, wrist pin, and pin locks
- Vehicle Fitment: Fits select 2016–2019 Yamaha YZ250F, YZ250FX, and WR250F models
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