Wiseco PK1877 Piston Kit 77mm 13.4:1 Compression Suzuki RMZ250 2010-2014

The Wiseco PK1877 is a complete forged piston kit designed for the Suzuki RMZ250 (2010–2014), featuring a 77mm bore and a high-compression 13.4:1 ratio for maximum four-stroke motocross performance. This kit includes Wiseco's top-end gasket set, giving you everything needed for a full top-end rebuild in one package.

Key Features:

• Forged construction — produced entirely in-house at Wiseco's USA facility for unmatched quality control from raw material to finished part
• ArmorGlide skirt coating — reduces friction and wear for extended piston and cylinder life under racing conditions
• 13.4:1 compression ratio — optimized for peak power output on the Suzuki RMZ250 platform
• 77mm bore diameter (Wiseco part 40007M)
• Condensed, aligned grain structure — forged pistons deliver superior mechanical properties, impact resistance, and fatigue strength compared to cast alternatives
• Optimized strength-to-weight ratio — each forging is engineered to reduce reciprocating mass while maintaining durability under extreme load
• Includes top-end gasket kit — complete kit for a full top-end service
• In-house dyno tested — Wiseco validates piston designs through rigorous R&D including real-world performance and durability testing

Wiseco has been the benchmark in high-performance forged pistons for motocross, off-road, ATV, snowmobile, and marine applications. Unlike cast pistons — which can fail catastrophically when yield strength is exceeded — Wiseco forgings feature a dense, directionally aligned grain structure that resists cracking, deformation, and fatigue under the brutal demands of competition riding.

The PK1877 kit is a direct-fit solution for the Suzuki RMZ250 (2010–2014), making it an ideal choice for racers and builders looking to restore or upgrade their top end with confidence.