Wiseco 653M04100 Forged Piston Kit Overbore - 41.00mm 2-Stroke 1.00mm

The Wiseco 653M04100 is a 41.00mm forged 2-stroke piston kit representing a 1.00mm overbore over the standard 40.00mm bore. Engineered, forged, and machined in the USA at Wiseco's facility in Mentor, OH, this piston is designed specifically for 2-stroke powersports engines and delivers the performance and durability Wiseco has built its reputation on for over 80 years.

Key Features:

• 41.00mm bore diameter — 1.00mm overbore for engines requiring cylinder reboring
• Forged from aerospace-grade aluminum alloy for superior strength and durability over cast alternatives
• Dedicated forgings with additional lightening operations for an optimized strength-to-weight ratio
• Improved tensile strength of forged material extends service life under high-stress 2-stroke conditions
• Kit includes: forged piston, piston ring(s), and circlips
• Note: Wrist pin is not included unless specifically noted — use OEM or Wiseco-supplied wrist pin
• Only Wiseco replacement ring sets are compatible with Wiseco pistons; ring types are not interchangeable between series
• Manufactured in the USA by American craftsmen with over 80 years of motorsports piston expertise

Wiseco is the only aftermarket piston manufacturer in the United States that produces pistons exclusively through the forging process, resulting in a denser, stronger, and more resilient component compared to cast alternatives. This piston is the ideal solution for a 2-stroke engine rebuild requiring a 1.00mm overbore, restoring performance and compression to like-new or better-than-stock levels.