Description
When your TRX400EX’s piston shows signs of wear or you’re pushing for higher RPMs, a quality rebuild is non-negotiable. The Wiseco 86mm 10:1 Piston Kit delivers the durability and precision needed to handle sustained high-load conditions, whether you’re racing or riding hard off-road. This complete kit eliminates the guesswork by including everything required for a full top-end rebuild—no hunting for compatible components.
Wiseco’s high-silicone forged construction resists thermal expansion better than OEM alternatives, maintaining critical clearances even during extended full-throttle sessions. The 10:1 compression ratio sits in the sweet spot for bolt-on performance gains without requiring fuel system modifications on most builds. Installation is straightforward for experienced mechanics, and you can trust these rings won’t cross over with cheaper aftermarket options.
- 86mm bore diameter
- 10:1 compression ratio
- High-silicone forged pistons
- Includes rings, wrist pins
- Includes circlips, gasket kit
- Honda TRX400EX fitment
- Years 1999–2008 compatible
- Complete top-end rebuild solution
- Minimal thermal expansion
- Wiseco rings (non-interchangeable)
- MPN: PK1033
