Description
A worn or damaged top end directly compromises your engine’s compression, power delivery, and reliability—especially critical if you’re pushing performance or clocking serious hours. The WSM Top End Kit gives you everything needed for a complete, quality rebuild without sourcing parts piecemeal. This is a straightforward bolt-in solution for Yamaha 4-stroke models that restores your engine to proper specification.
- Complete piston assembly
- OEM-grade piston rings
- Wrist pins and clips
- Needle bearings included
- Head gasket seal
- Base gasket seal
- Intake gasket included
- Exhaust gasket included
- Oil filter included
- Yamaha 4-stroke models
- MPN: 54-546-21
- .25mm oversized piston
- No machine work required
- All components factory-matched
