Wiseco 235M05400 Pro-Lite 2-Stroke Piston Kit 54mm +2mm Overbore

The Wiseco 235M05400 is a high-performance forged piston kit designed as a +2mm overbore (54mm) replacement for Yamaha 100cc two-stroke engines. Engineered to restore and enhance top-end performance, this piston kit is a trusted solution for riders performing a cylinder rebuild or seeking improved power over a worn stock piston.

Wiseco's Pro-Lite pistons are forged from high-silicon, low-expansion aluminum alloy, delivering a superior strength-to-weight ratio compared to cast alternatives. The innovative forging design and optimized piston skirt geometry are engineered to maximize horsepower and torque output while maintaining reliable, long-lasting service life.

Kit Includes:

• 1 Forged aluminum piston
• 1 High-performance ring set (2126CD)
• Wrist pin
• Circlips

Key Specifications:

• Bore Size: 54.00mm (+2.00mm oversize)
• Cross-Reference: 235P8, 103702
• Ring Set: 2126CD
• Construction: Forged high-silicon aluminum alloy
• Stroke Type: 2-stroke

Important Notes:

• This is an oversize piston — cylinder boring or sleeving is required before installation
• Wiseco rings, circlips, and wrist pins are not interchangeable with OEM or non-Wiseco components
• Top-end bearings, gaskets, and cylinder sleeves are sold separately