Wiseco PK1156 Forged Piston Kit with Top-End Gasket Kit - 54.5mm 2-Stroke

The Wiseco PK1156 is a complete 2-stroke top-end piston kit designed for the 1998–2006 Kawasaki KX100 and 2003–2005 Suzuki RM100. Featuring a 54.50mm (651M) bore diameter, this kit delivers everything needed for a full top-end rebuild or overbore in a single package.

What's Included:

• Forged piston
• Piston ring(s)
• Wrist pin
• Circlips
• Top-end wrist pin bearing
• Top-end gasket kit

Key Features:

• 100% USA forged construction — Wiseco is the only U.S. aftermarket manufacturer that produces pistons exclusively using the forging process
• In-house forging and tooling — full manufacturing control from raw bar stock through finished skirt-coated parts ensures consistent quality
• Superior strength over cast pistons — forged pistons feature condensed, aligned grain structure that delivers higher mechanical properties, impact resistance, and fatigue resistance
• Optimized strength-to-weight ratio — each forging is engineered to maximize performance without unnecessary mass
• In-house dyno testing — real-world validation drives ongoing development of advanced shapes, coatings, and components
• ArmorGlide skirt coating — reduces friction and improves durability under high-heat, high-stress racing conditions

Wiseco's PK1156 piston kit is engineered for the demands of dirt bike racing, where reliability and performance under extreme conditions are non-negotiable. All components are specifically matched to the forged piston for a hassle-free, one-stop top-end rebuild solution.