Description
A worn or damaged top end dramatically reduces engine efficiency, compression, and reliability—especially in high-performance applications. This complete WSM piston kit supplies everything needed for a full top-end rebuild on your 4-stroke, eliminating the hassle of sourcing individual components. Precision-manufactured to OEM specifications, it restores your engine’s power delivery and longevity with a single, comprehensive solution.
- Manufacturer Part Number: 54-546-11
- Application: Yamaha 4-stroke models
- Piston oversize: .25mm
- Includes pistons and rings
- Wrist pins included
- Piston clips supplied
- Needle bearings included
- Head gasket included
- Base gasket included
- Intake gasket included
- Exhaust gasket included
- Oil filter included
- Bolt-on installation
- Professional installation recommended






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