Water Sports WSM Piston Kit for Yamaha Oversize

The Water Sports WSM oversize piston kit for Yamaha helps restore compression, power and reliability when you rebuild a two-stroke personal watercraft engine. The pistons are made for worn or re-bored cylinders. They make a good engine top end rebuild or cylinder refresh part. Customers also call it a Yamaha PWC piston set, an oversize piston and ring kit, or a top end piston kit.

Key Features:

• Oversize pistons for cylinders that have been honed or bored beyond standard size
• Made for the heat, load and wet conditions of marine two-stroke engines
• Designed to restore cylinder sealing and compression during a rebuild
• Aftermarket piston kits from WSM, a brand used by PWC technicians and rebuild specialists
• Available in several oversize steps, so you can match the kit to your measured cylinder bore

Measure your cylinders before ordering so you choose the correct oversize. Follow the proper break-in and engine assembly procedures from the service manual for the best results and long engine life.