Wiseco CK165 Complete Top End Piston Kit 77mm 13:1 Compression 5-Valve Domed

The Wiseco CK165 is a complete top end piston kit engineered for high-performance applications. Featuring a 77mm bore with a 13:1 compression ratio and a domed piston design optimized for five-valve combustion chambers, this kit delivers the performance and reliability demanded by serious riders and racers.

Wiseco's complete top end piston kits are manufactured using dedicated forgings, providing a superior strength-to-weight ratio compared to cast alternatives. The race-ready domed finish features smooth edges engineered to improve combustion flow and maximize power output.

Key Features:

• 77mm bore diameter with a 13:1 compression ratio domed design
• Five-valve (5V) compatible domed piston for optimized combustion chamber flow
• ArmorGlide skirt coating reduces friction and noise while contributing to increased horsepower
• Dedicated forged construction for superior strength-to-weight ratio over cast pistons
• High-performance ring kit included for a complete, ready-to-install assembly
• Alloy wrist pin included — everything needed for a proper top end rebuild
• Complete top end gasket kit included for a leak-free, professional finish
• Race-ready dome finish with smooth edges for improved combustion flow

The Wiseco CK165 piston kit includes everything needed to complete a proper top end rebuild — piston, rings, wrist pin, circlips, and gasket set. It is a direct-fit, high-performance upgrade suitable for both track and street performance builds.