The WISECO Piston Kit in 56.00 mm size is designed for select Yamaha YZ125 and YZ125X applications. Manufacturer part number 900M05600. The kit includes a piston, ring or rings, wrist pin, and circlips.
Built for endurance and high-rpm performance, each piston features an electra-coated dome, ring groove, and pin bore for wear resistance and protection from micro-welding, galling, and detonation. GP Series construction generally uses less machining on the outside of the piston to help seal the bore and increase compression.
ArmorGlide® skirt coating is designed to reduce friction and noise for increased horsepower potential. The piston is engineered, forged, and machined in the USA. Distributor part number: 900M05600. Fitment includes the 2022, 2023, 2024, and 2025 Yamaha YZ125; 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.
Features:
- Size: 56.00 mm
- Coating: Electra coating on the dome, ring groove, and pin bore for wear resistance and protection from micro-welding, galling, and detonation
- Skirt coating: ArmorGlide® coating helps reduce friction and noise
- Construction: Engineered, forged, and machined in the USA
- Kit contents: Piston, ring or rings, wrist pin, and circlips
- Fitment: Select Yamaha YZ125, YZ125X, and Yamaha YZ125 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 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