Description
When you’re boring out your Polaris Sportsman 90, you need pistons engineered to handle the increased displacement without sacrificing reliability. The Wiseco 839M05250 delivers forged-aluminum durability and precision fitment, giving you the confidence to push harder whether you’re trail riding or prepping for competition. This +0.50mm oversize kit restores lost compression and optimizes combustion efficiency—essential upgrades for any serious rebuild.
- Forged aluminum construction
- +0.50mm oversize bore
- 52.50mm piston diameter
- Fits Polaris Sportsman 90 (2001–2005)
- High-temperature rated
- Reduced reciprocating weight
- Precision-engineered fitment
- Gasket kit sold separately
- MPN: 839M05250
