Description
A worn top end compromises power delivery, fuel efficiency, and engine reliability—the WSM Top End Kit gives you factory-spec performance without the full engine rebuild cost. This complete piston assembly restores compression and ring seal, critical for maintaining peak horsepower in 4-stroke Yamaha models. Whether you’re returning from a season of hard riding or refreshing an aging engine, this kit handles the job with OEM-quality components.
Kit Contents & Specifications:
- CNC-machined pistons
- Compression rings included
- Wrist pins, retaining clips
- Needle bearing set
- Cylinder head gasket
- Base gasket, seals
- Intake gasket
- Exhaust gasket
- Oil filter included
- 1mm overbore sizing
- 4-stroke engine application
- Yamaha-specific fitment
- MPN: 54-544-14
- Bolt-on installation
