The WISECO Piston Kit in 58.00 mm is designed for selected Yamaha YZ125 and YZ125X applications. This kit features an electra-coated piston dome, ring groove, and pin bore to support wear resistance and protection from micro-welding, galling, and detonation. ArmorGlide® skirt coating is designed to reduce friction and noise for increased horsepower potential.
The WISECO GP Series piston generally uses less machining on the outside, which helps seal the bore for increased compression. The piston is engineered, forged, and machined in the USA. The kit includes the piston, ring or rings, wrist pin, and circlips.
Vehicle fitment includes the 2022, 2023, 2024, and 2025 Yamaha YZ125; the 2023 and 2024 Yamaha YZ125X; the 2022 and 2023 Yamaha YZ125 Monster Energy Yamaha Racing Edition; the 2024 Yamaha YZ 125 Monster Energy Racing; and the 2025 Yamaha YZ125 Monster Energy Yamaha Racing Edition. Manufacturer part number: 900M05800.
Features:
- Product size: 58.00 mm
- Electra-coated dome, ring groove, and pin bore support wear resistance and protection from micro-welding, galling, and detonation
- ArmorGlide® skirt coating is designed to reduce friction and noise for increased horsepower potential
- GP Series design generally uses less machining on the outside to help seal the bore for increased compression
- Kit includes piston, ring or rings, wrist pin, and circlips
- Engineered, forged, and machined in the USA
- Fits selected 2022–2025 Yamaha YZ125, 2023–2024 Yamaha YZ125X, and specified Monster Energy Yamaha Racing Edition models
- Manufacturer part number: 900M05800
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 YZ 125 Monster Energy Racing
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