Wiseco Piston Kit Honda CRF450R 2002-2008 1mm Oversize 4332M10100

If you're running a CRF450R past 2008 and demand reliable power delivery, a 1mm overbore piston kit is a smart investment—it restores compression in worn cylinders while unlocking modest displacement gains without requiring full engine rebuilding. The Wiseco 4332M10100 delivers the durability and precision fit that competitive riders and serious trail enthusiasts expect, with everything you need for a straightforward installation.

Built from high-silicon alloy, this piston handles the thermal and mechanical stress of aggressive riding, whether you're pushing hard on closed courses or tackling demanding terrain. The included rings and circlips mean no hunting for compatible components—just bolt it in and go.

• High-silicon alloy construction
• 1mm oversize specification
• Includes rings, circlips
• CRF450R 2002–2008
• Lightweight design
• Precision-engineered tolerances
• Trail and racing capable
• Complete kit—ready to install