Wiseco 2375M06800 Pro-Lite Piston Kit 68.00mm +0.50mm Oversize 443cc 2-Cylinder

The Wiseco 2375M06800 is a Pro-Lite forged piston kit designed for the Ski-Doo MXZ 440 (Rotax) 2-stroke snowmobile engine. This kit provides a 0.50mm oversize bore with an actual bore diameter of 68.00mm, making it ideal for rebuilds on cylinders that have been bored out from the standard 67.50mm dimension. The 2-cylinder, liquid-cooled Rotax engine displaces 443cc with a 61.00mm stroke.

Wiseco Pro-Lite pistons are CNC-machined from high-silicon, low-expansion aluminum alloy, delivering a superior strength-to-weight ratio along with excellent heat transfer and reduced thermal expansion. The dedicated forging design and optimized cam shape and skirt profile are engineered for peak horsepower output and extended service life.

Key Features:

• Pro-Lite forged piston — dedicated aerospace-grade aluminum alloy forging
• CNC-machined cam shape and skirt profile for optimal HP and service life
• Actual bore diameter: 68.00mm (+0.50mm oversize)
• Standard bore: 67.50mm | Stroke: 61.00mm | Displacement: 443cc
• Designed for cast iron bore, liquid-cooled 2-stroke engines
• High-performance semi-keystone ring set (2677LK) included
• 18mm unchromed wristpin (S477) included
• Round wire pin locks/circlips (CW18) included
• Covers a single cylinder — order one kit per cylinder

Kit Contents (per cylinder):

• 1x Pro-Lite piston
• 1x 2677LK — 68.0mm semi-keystone "L" ring set
• 1x S477 — 18mm x 2.0748" unchromed wristpin
• 1x CW18 — 18mm round wire pin locks (pair)

Important: This kit covers a single cylinder. Gaskets, top-end bearings, and cylinder sleeves are not included. Oversize pistons require the cylinder to be bored to the appropriate oversize dimension. Always verify your standard bore size before ordering to ensure you select the correct oversize.

Wiseco cross-reference: 2375M06800 | Also referenced as part of the SK1206 top-end kit.