Wiseco 4732M09500 Forged Piston Kit Standard Bore - 95mm 525cc

The Wiseco 4732M09500 is a forged piston kit engineered for high-performance 525cc powersports applications. Designed as a direct-fit standard bore replacement, this kit delivers the strength, precision, and durability that demanding off-road and ATV riding conditions require.

Wiseco manufactures all of its pistons entirely in-house in the USA — from raw bar stock through forging, machining, and skirt coating — giving them complete control over every stage of the production process. This end-to-end manufacturing approach ensures consistent quality and tight tolerances that performance riders depend on.

Why Forged Over Cast?

Unlike cast pistons, Wiseco forgings feature a condensed, aligned grain structure that dramatically improves mechanical strength, impact resistance, and fatigue life. Cast pistons tend to be brittle and can fail catastrophically under extreme loads, while forged pistons are engineered to handle the sustained abuse of high-performance motorsport use.

Key Features:

• Forged aluminum construction — superior strength-to-weight ratio vs. cast alternatives
• 95mm standard bore diameter — direct-fit replacement, no boring required
• 19mm wrist pin — compatible with OEM rod specification
• In-house forged and machined — all tooling and manufacturing performed in the USA
• Skirt coating applied — reduces friction and improves break-in characteristics
• Optimized grain structure — enhanced fatigue resistance under extreme RPM and load cycles
• Designed for 525cc performance applications — KTM 525 XC (2008–2010) and Polaris Outlaw 525 (2007–2010)

Each piston is designed to optimize the strength-to-weight ratio for maximum performance output without compromising reliability. Whether you're competing on the track or pushing the limits on the trail, the Wiseco 4732M09500 provides the foundation for a dependable, high-output engine build.