Wiseco PK1308 Pro-Lite 54.0mm Piston Top End Kit for 1989 Suzuki RM125

The Wiseco PK1308 is a complete Pro-Lite top end piston kit designed as a high-performance replacement for the 1989 Suzuki RM125. Featuring a 54.0mm bore diameter (Wiseco bore code 641M), this kit delivers everything needed for a full top end rebuild with race-grade components that meet and exceed OEM standards.

The Pro-Lite piston is forged from aerospace-grade aluminum alloy, providing an superior strength-to-weight ratio compared to cast OEM pistons. Each piston features a dedicated forging design with a precisely CNC-machined cam profile optimized for peak horsepower output and extended service life in two-stroke motocross applications.

Kit Includes:

• Pro-Lite forged piston – aerospace alloy construction with optimal cam shape and profile
• High-performance ring set – engineered for extended life and sustained power output
• Premium top end needle bearing – precision machined for reduced friction and long service life
• Alloy wrist pin – high-quality, precision-ground for consistent fit and durability
• Wiseco top end gasket kit – premium materials exceeding OEM sealing standards

Wiseco's Pro-Lite piston kits are race proven across all forms of motorsport and trusted by top professional race teams worldwide. The 641M bore designation corresponds to the standard 54.0mm bore size for the 1989 Suzuki RM125 two-stroke engine. Whether rebuilding after a season of hard riding or prepping for competition, the PK1308 delivers reliable, high-output performance you can count on.