Wiseco WK1167 ProLite Forged Piston Kit 783cc 71.50mm Bore for Polaris PWC

The Wiseco WK1167 is a high-performance ProLite forged piston kit designed for Polaris personal watercraft equipped with the 780cc 3-cylinder 2-stroke engine. This complete top-end kit features a 71.50mm bore (0.25mm oversize) and displaces 783cc, making it an ideal choice for engine rebuilds on Polaris SL, SLT, and SLX 780 models.

Key Features:

• Forged high-silicon, low-expansion aluminum construction — delivers superior strength, reduced weight, improved heat transfer, and extended service life compared to cast pistons
• 71.50mm bore diameter — 0.25mm oversize for use in bored or worn cylinders
• ProLite design — lightweight forged profile engineered to reduce reciprocating mass and improve throttle response
• Diamond-turned CNC finish — precision machined to tight tolerances, ensuring consistent sizing and a perfect fit in cast iron, chrome, Nikasil, and boron composite cylinder bores
• Dedicated PWC ring package — piston rings are specifically designed for personal watercraft applications, maximizing compression seal and oil control
• Complete kit — includes 3 forged pistons, 3 piston ring sets, 3 wrist pins, and circlips; everything needed for a full top-end rebuild

Wiseco piston kits are compatible with all common cylinder bore compositions including cast iron, chrome, Nikasil, and boron composite. Oversize pistons also support cylinder resleeving applications. Each kit includes a detailed installation guide.

Kit Contents:

• 3x Wiseco 633M07150 forged pistons
• 3x piston ring sets
• 3x wrist pins
• Circlips