6M6-11631-00 Piston Kit For Yamaha 650 series Personal Watercraft (PWC) Engine

The 6M6-11631-00 Piston Kit is a precision-engineered standard-size replacement piston designed for Yamaha 650 series Personal Watercraft (PWC) equipped with 650cc two-stroke engines. Manufactured to OEM specifications, this piston kit is ideal for engine rebuilding, maintenance, and performance restoration applications. Restore the power and performance of your Yamaha personal watercraft with the 6M6-11631-00 Piston Kit, a premium aftermarket replacement designed for Yamaha 650 engines. Manufactured to OEM-equivalent specifications, this standard-size piston kit provides precise fitment, reliable compression, and long-lasting durability for engine rebuild and maintenance applications. Produced by OSAKA Marine Industrial, this piston kit is engineered to withstand demanding marine conditions while delivering dependable performance for recreational and professional PWC use. Featuring a 77 mm standard bore size, the piston is produced from high-strength aluminum alloy to provide excellent durability, heat resistance, and reliable performance in demanding marine environments. It helps restore proper compression, improve combustion efficiency, and maintain smooth engine operation.

Fits Yamaha 650 Models:

✔ Super Jet SJ650 (1990–1993)

✔ Wave Runner III 650 (1990–1996)

✔ Wave Runner LX 650 (1990–1993)

✔ Wave Runner VXR 650 (1991–1995)

OEM Reference: 6M6-11631-01-93

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