Wiseco GP Series Piston Kit, 41.50 mm, Yamaha PW50 (653M04150)

Upgrade the performance and durability of your Yamaha PW50 with the Wiseco 653M04150 GP Series Piston Kit. Forged from a high-silicon aluminum alloy, this piston is engineered for strength, dependable operation, and sustained performance in trail and racing applications. Wiseco’s advanced forging design and piston skirt profile help maximize horsepower and torque while supporting the demanding requirements of expert riders, racers, and tuners.
The kit includes a forged piston, rings, wrist pin, and circlips for a comprehensive installation solution. Its high-performance design supports increased compression ratios and uses an ultra-stiff strutted forging to help maintain consistent operation under demanding conditions. Titanium nitride-coated rings are designed to improve durability and sealing, helping the engine deliver power more effectively over an extended service interval.
Each Wiseco 653M04150 piston receives an E-Coat treatment on the crown, ring grooves, and wrist pin bore to improve wear resistance and help protect against micro-welding, galling, and detonation. GP Series pistons typically require less external machining, which can help improve bore sealing and increase compression. Boost ports are removed to promote a more predictable powerband and stronger top-end pull. Cylinder sleeves must be purchased separately. Racer’s Choice pistons may allow longer service intervals than conventional Wiseco pistons, but they are intended for expert racers and professional tuners who can properly set up and maintain the engine.

Features:

• Forged high-silicon aluminum alloy construction for strength and dependability

• Designed for Yamaha PW50 trail and racing applications

• 41.50 mm piston size for precise engine fitment

• Includes forged piston, rings, wrist pin, and circlips

• High compression design supports increased horsepower and torque

• Ultra-stiff strutted forging helps sustain performance under racing conditions

• Titanium nitride-coated rings improve durability and sealing

• E-Coated crown, ring grooves, and wrist pin bore resist wear, galling, micro-welding, and detonation

• GP Series design supports improved bore sealing and a more predictable powerband

• Boost ports removed for increased top-end pull

• Cylinder sleeve sold separately

• Part number: 653M04150

Ships from Parts Unlimited.