The WOSSNER Piston Kit in 57.95 mm is forged from aerospace-grade aluminum alloy and engineered to maintain strength in key areas, including the crown and skirt wall cross section. Optimized machining helps reduce weight while supporting reliable piston performance.
A permanent skirt coating is designed to reduce friction and piston rock, contributing to quieter operation and improved performance. The kit includes the piston, rings, pin and clips.
Manufacturer part number: 8321D400. Distributor part number: 09106619. Fitment includes the 2022 Yamaha YZ125, 2022 Yamaha YZ125 Monster Energy Yamaha Racing Edition, 2023 Yamaha YZ125 Monster Energy Yamaha Racing Edition, 2024 Yamaha YZ125X, 2024 Yamaha YZ125 50th Anniversary Edition, 2025 Yamaha YZ125, 2025 Yamaha YZ125 Monster Energy Yamaha Racing Edition, 2026 Yamaha YZ125, 2026 Yamaha YZ125 70th Anniversary Edition and 2026 Yamaha YZ125X.
Features:
- Brand: WOSSNER
- Product type: Piston kit
- Size: 57.95 mm
- Construction: Forged from aerospace-grade aluminum alloy
- Skirt coating: Permanent coating designed to reduce friction and piston rock
- Machining: Optimized for lightness while maintaining strength in key areas
- Included components: Piston, rings, pin and clips
- Manufacturer part number: 8321D400
- Distributor part number: 09106619
- Fitment: Select 2022–2026 Yamaha YZ125 and Yamaha YZ125X models, including specified anniversary and Monster Energy Yamaha Racing Edition models
Fitment:
2022 Yamaha YZ125
2022 Yamaha YZ125 Monster Energy Yamaha Racing Edition
2023 Yamaha YZ125
2023 Yamaha YZ125 Monster Energy Yamaha Racing Edition
2023 Yamaha YZ125X
2024 Yamaha YZ125
2024 Yamaha YZ125 50th Anniversary Edition
2024 Yamaha YZ125X
2025 Yamaha YZ125
2025 Yamaha YZ125 Monster Energy Yamaha Racing Edition
2025 Yamaha YZ125X
2026 Yamaha YZ125
2026 Yamaha YZ125 70th Anniversary Edition
2026 Yamaha YZ125X