Wiseco 2345M07350 Pro-Lite 2-Stroke Forged Piston Kit 73.50mm 1.50mm Oversize

The Wiseco 2345M07350 Pro-Lite Piston Kit is a dedicated forged piston kit engineered for the Polaris 488/500 Fuji 2-stroke engine. Ground up from aerospace-grade alloy using application-specific forgings, this kit delivers an optimal strength-to-weight ratio purpose-built for demanding snowmobile trail and racing use. The Pro-Lite design reflects Wiseco's race-proven engineering heritage and is the choice of competitive teams across all forms of powersports racing.

This kit is sized at a +1.50mm oversize, bringing the actual bore diameter to 73.50mm (standard bore: 72.00mm) for a 509cc displacement on the twin-cylinder Fuji engine with a 60.00mm stroke. The piston is precision CNC-machined with an optimized cam profile for peak horsepower output and extended service life. The alloy wristpin is manufactured to tight tolerances for consistent, durable operation, and the included high-performance ring set is designed to maintain a strong seal and sustained power output over the long term.

Kit Contents:

• 2 Pistons (covers both cylinders — Note: kit covers a single cylinder; order quantity of 2 for a complete twin-cylinder engine)
• Ring Set — 2894CD 73.50mm ring set
• Wristpin — S459 18mm x 1.850" unchromed pin (qty. 2)
• Circlips — CW18 round wire pin locks, 18mm (2 pairs)

Specifications:

• Standard Bore: 72.00mm
• Oversize: +1.50mm
• Actual Bore: 73.50mm
• Stroke: 60.00mm
• Displacement: 509cc
• Cylinders: 2
• Engine Type: Fuji 2-Stroke
• Bore Notes: Pro-Lite, Cast Iron Bore
• Wiseco Part Number: 2345M07350

Important Notes: Top-end bearings, gaskets, and cylinder sleeves are not included unless otherwise noted. This kit will not fit Widetrack models. When ordering, confirm your standard bore size to ensure you are selecting the correct oversize increment. Wiseco piston kits are manufactured in the USA.