Wiseco 633M07150 ProLite 71.50mm 2-Stroke Forged Piston for Polaris SL/SLT780 PWC

The Wiseco 633M07150 ProLite Forged Piston is a high-performance 2-stroke piston engineered for Polaris personal watercraft applications. Featuring a 71.50mm bore diameter, this oversize forged piston is designed to restore or enhance engine performance in demanding PWC use. It is sold as part of the Wiseco WK1167 ProLite Piston Kit, which includes the piston, piston rings, wrist pin, and circlips for a complete top-end rebuild.

Key Features:

• Forged 2-stroke construction — forged from high-silicon aluminum bar stock for greater tensile strength and lower thermal expansion compared to cast pistons
• 71.50mm oversize bore — provides an oversize option for worn or resleeved cylinders, extending engine service life
• ProLite design — reduced weight for improved throttle response and power output
• Precision CNC-machined finish — diamond-turned on computer-controlled turning centers for consistent sizing and a superior surface finish
• Compatible with multiple cylinder bore types — suitable for cast iron, chrome, Nikasil, and boron composite cylinder compositions
• Dedicated ring design — Wiseco rings are application-specific and engineered to work exclusively with Wiseco pistons for maximum compression and oil control
• Complete kit contents — includes forged piston, piston rings, wrist pin, and circlips

Wiseco part number 633M07150 is an oversize replacement piston for Polaris SL/SLT 780 personal watercraft. Whether rebuilding a worn top end or upgrading cylinder bore, this ProLite piston delivers the reliability and performance that Wiseco is known for across decades of powersports competition.