Wiseco PK1663 Forged Piston Kit with Top-End Gasket Kit - 4795M 94.5mm 12.5 1

The Wiseco PK1663 is a complete top-end piston kit featuring a 94.50mm bore and 12.5:1 compression ratio, purpose-built for 400cc Suzuki and Kawasaki single-cylinder four-stroke engines. As a PK-series kit, it includes everything needed for a thorough top-end rebuild in a single package.

Kit Includes:

• Forged 4795M piston (94.50mm bore)
• High-performance piston ring set for extended service life and sustained power
• Chrome-plated alloy wrist pin with horizontal slot pin oiling for reduced friction
• Complete top-end gasket kit with premium sealing materials that meet or exceed OEM standards

Forged Piston Advantages:

• Manufactured from aerospace-grade aluminum alloy for a superior strength-to-weight ratio
• Dedicated forging with condensed, aligned grain structure delivers higher mechanical properties and resistance to impact and fatigue
• ArmorGlide skirt coating reduces friction and scuffing for longer piston life
• Dome design with smooth edges promotes improved flame travel and combustion efficiency
• CNC-machined to precise tolerances for a diamond-turned finish with no size variation
• Pressure-seal ring groove maximizes ring seal and blowby resistance

Wiseco is the only U.S. manufacturer to forge its own powersports pistons in-house, controlling every step of production from raw billet to finished skirt coating. Each design is validated through in-house dyno testing and is race-proven across Supercross, Motocross, GNCC, and off-road competition. The Wiseco PK1663 (forging number 4795M) delivers the durability and performance demanded by hard-use four-stroke applications.