This kit includes:
High-Compression JE Piston
Gasket Kit
New Custom Cylinder Kit

Featuring incredible reliability including victories in the Nevada 1000 and the Vegas to Reno BITD races, this 520cc big bore cylinder kit provides both the power and ridability you desire in a big bore kit!

NOTE: Cam shown in picture is not included in the 520cc kit but is available separately.

Available in a 41mm version, the FCR carb will work wonders for your new TRX450R. You will see huge gains throughout the powerband and your intake system will be able to keep up with the demands of the aftermarket exhaust system or big bore kit on your TRX. This carburetor kit comes with a Motion Pro twist throttle assembly.