Description
The Wiseco 478M08750 piston kit delivers the precision engineering and durability your YZ490 or IT490 demands, whether you’re pushing hard on the track or tackling demanding trail conditions. Built from high-silicon alloy, this piston resists the extreme thermal and mechanical stress of sustained high-RPM operation while maintaining the lightweight responsiveness that separates competitive riders from the rest. Since it arrives complete with rings and circlips, installation is straightforward—no sourcing additional components.
- High-silicon alloy construction
- Fits YZ490 (1982–1983)
- Fits IT490 (1983–1984)
- Complete kit included
- Rings and circlips
- Precision CNC-engineered
- Lightweight design
- Thermal stress resistant
- Race and trail rated
- Tested under extreme conditions
