🔧 Honda CRF450R 100mm +4 CP Big Bore Piston & Gasket Kit (2002–2008)

Unlock big performance gains with this high-compression 100mm big bore piston kit for your CRF450R. This top-end rebuild combo is designed for serious riders who want more torque, throttle response, and durability from their race engine.

This CP forged piston boosts displacement and increases compression to 13.5:1, perfect for high-performance builds. The included Cometic gasket kit features MLS head gaskets for long-lasting sealing power under extreme heat and pressure.

✅ What’s Included

• CP 100mm Forged Big Bore Piston (13.5:1 compression)

• Piston Rings

• Wrist Pin

• Circlips

• Full Cometic Top End Gasket Kit (including MLS Head Gasket)

📦 Fitment

Fits Honda CRF450R:

• 2002 CRF450R

• 2003 CRF450R

• 2004 CRF450R

• 2005 CRF450R

• 2006 CRF450R

• 2007 CRF450R

• 2008 CRF450R

Replaces/compatible with part numbers:
M2052, C3122, C3077, 10002, 4822M09600, 8668DA, C3047, C3139, 30-32700, 12100-MEB-670, 13101-MEB-670, 12251-MEB-671, 13011-MEB-670, and more.

🛡️ Warranty Info

This is a high-performance race part with no manufacturer warranty implied. Proper installation and tuning required. We recommend professional installation for optimal results.