Wiseco PK1664 Forged Piston Kit with Top-End Gasket Kit - 94.5mm 13.5 1

The Wiseco PK1664 is a high-performance forged piston kit designed for 2000–2008 Suzuki and 2003–2006 Kawasaki 400cc applications. Featuring a 94.5mm bore diameter and a 13.5:1 compression ratio, this kit is engineered to deliver maximum power and durability in demanding off-road and powersports environments. The kit includes a complete top-end gasket kit for a straightforward installation.

Why Forged Over Cast?

Wiseco forged pistons feature a condensed, aligned grain structure that gives them significantly higher mechanical properties than cast alternatives. Cast pistons are brittle and prone to catastrophic failure when material yield strength is exceeded. Wiseco forgings resist impact and fatigue, making them the preferred choice for high-performance and racing applications.

Key Features:

• 94.5mm bore diameter — fits Wiseco 4796M bore specification
• 13.5:1 compression ratio for optimized high-performance output
• Forged in-house in the USA using proprietary tooling and raw materials
• Skirt coating applied to finished parts for reduced friction and improved wear resistance
• Optimized strength-to-weight ratio through precision forging design
• Includes top-end gasket kit for a complete rebuild solution
• Developed through in-house dyno testing and rigorous R&D
• Suitable for dirt bikes, ATVs, snowmobiles, outboard marine, and motorcycles

Wiseco controls every stage of production — from forge tooling and raw bar sourcing to skirt coating and final inspection — ensuring consistent quality and tight tolerances. Their vertically integrated manufacturing process allows rapid development of advanced piston shapes, coatings, and components that keep Wiseco at the forefront of motorsport technology.