The Wiseco team has remained at the forefront of powersports performance through every era and evolution, including the development of high-performance 4-strokes. Today, Wiseco’s forged 4-stroke pistons are designed for each specific engine application and built to the tightest tolerances for the ultimate combination of performance and strength. Proven at every level of riding, Wiseco 4-stroke pistons are ready to deliver the power and reliability you’re looking for.

• Engineered, forged, and machined in the USA in Mentor, OH
• Designed and built for each specific 4-stroke powersports engine
• Improved tensile strength of forged material optimizes strength and service life
• Dedicated forgings allow for optimized strength-to-weight ratio
• Includes high-quality piston rings, wrist pin(s), and circlips

Product Series	4 Stroke Forged Series
Included Components	Ring Set #2402XA, Wrist Pin #591-1750-10-93C, CirClip #CW15
Bore Diameter	61.00 MM
Piston Diameter	60.95 MM
Piston Material	4032
Skirt Coating	No
Piston Oversize	STD

 

FITS:
1979 Yamaha RD400
1978 Yamaha RD400
1977 Yamaha RD400
1976 Yamaha RD400
1975 Yamaha RD350
1974 Yamaha RD350
1973 Yamaha RD350