

More delivery methods in checkout
Return this item within 7 days of purchase.
Get an immediate answer with AI
AI-generated from the text of manufacturer documentation. To verify or get additional information, please contact customer service.
Rebuilding the top end on your 2006-2009 YZ450F?

This kit has everything you need.
It's a standard bore setup: fresh Cylinder Works cylinder, Wiseco piston at 95mm with 12.5:1 compression, and all the gaskets.

Brand new, never used.

Part numbers: 20003 (cylinder) and 4785M09500 (piston).

Just what the doctor ordered for getting that YZ back to full power.

Drop-in ready, high-quality components.



5 out of 5