Description
Owners of a 1993-2012 Yamaha YFM400 Kodiak or Big Bear rebuilding the top end can spec this Wiseco 4676M piston kit for that exact platform.
When a 4-stroke ATV engine starts losing compression or smoking, the piston, rings, and pin are usually the source, and a proper rebuild calls for a kit that covers all of it rather than piecing parts together separately. This kit bundles the piston with the gasket set and pin needed to put the top end back together correctly.
- Includes a Wiseco top end gasket kit alongside the piston
- Dedicated forging built for this specific engine rather than a generic blank
- Aerospace alloy construction for a strong strength-to-weight ratio
- Dome design intended to improve flame travel through the combustion chamber
- Chrome plated piston pin with horizontal slot oiling to cut friction and resist scuffing
- Pressure seal groove aimed at maximizing ring seal
- Available in a +1 oversize, bringing the bore to 84mm at an 8.6:1 compression ratio
For the 1993-2012 YFM400 Kodiak and Big Bear at the 84mm +1 size, this kit gives a shop or DIY mechanic everything needed for a complete top-end rebuild in one part number.
