Athena / CP Carrillo / AZ Quad Parts / Hotrods Full Motor Rebuild Kit 

102mm 500cc Big Bore Cylinder Motor Rebuild Kit!

This Is The Best Big Bore Kit On The Market!

Fits Yamaha YZ450F & YZ450FX Dirt Bike Models

 Years 2014 2015 2016 2017

This kit includes:

• 102mm 500cc Nikasil Athena Big Bore Cylinder
• Larger Water Jackets Keep Your Motor Cooler!
• CP Cariilo Piston Kit (Includes, Piston, Pin, Rings & Clips) 
• 13.5:1 OR 14:1 Compression Ratio (We Can Set This For Pump Or Race Gas, Please Specify At Checkout)
• Piston Kit Will Handle Up To +2mm Bigger Valves!
• Athena Complete Top End Gasket Set
• Hotrods Heavy Crankshaft & Connecting Rod
• Hotrods Main Bearings
• Complete Motor Gasket Set
• Bottom End Seal Kit

It will work with your stock head and valves.  All parts come with warranty.

We ship worldwide & ship all domestic orders free!