Wiseco SK1368 Top End Kit Yamaha Snowmobile 82mm 1049cc 9.5:1 Turbo

The Wiseco SK1368 is a precision-matched and balanced top end kit engineered for Yamaha 3-cylinder snowmobile engines running a turbo setup. This kit bores out the stock 973cc engine to 82mm / 1049cc at a turbo-friendly 9.5:1 compression ratio, making it the ideal choice for riders building a boosted application on the Yamaha Nytro, RS Vector, RS Venture, RS Rage, and RS Vector Mountain platforms (2005–2015).

Wiseco's SK-series kits are precision matched and balanced from the factory, ensuring optimal performance and longevity right out of the box. The pistons feature a skirt coating to reduce friction and improve scuff resistance during break-in and high-load operation. Note that cylinder plating is required for this oversize bore application.

Kit Includes:

• Forged high-silicon aluminum alloy pistons (82.00mm bore)
• Piston rings
• Wrist pins
• Circlips
• Top end gasket set (includes head gasket)

Key Specifications:

• Bore: 82.00mm
• Displacement: 1049cc (overbore from stock 973cc)
• Compression Ratio: 9.5:1 (turbo-optimized)
• Overbore: 0.118" over standard
• Skirt Coated: Yes
• Cylinder Prep Required: Cylinder plating required for oversize bore
• Application: Turbo use

Wiseco forged pistons are manufactured from high-silicon aluminum alloy for superior strength and heat resistance, making them well-suited for the elevated cylinder pressures and temperatures of a turbocharged snowmobile engine. This SK-series kit provides everything needed for a complete top end rebuild or bore-up in a single package.