Here is the big bore kit proposed by ATHENA to increase the displacement of your motocross / enduro YAMAHA YZF in 450cc 4 stroke from 2010 to 2017. This kit in Ø102mm against Ø96mm of origin thus makes it possible to pass your motor bike of 450cc has 500cc! A gain of torque and performance will be immediately felt. It allows a gain of 4 HP on average which is huge on this vehicle. Enough to have fun on the tracks or in the forest. ATHENA has also planned things well because this top engine is sold complete. It includes the cylinder, piston, ring as well as all the gaskets you need for a quality and tight reassembly. The advantage of taking this engine is that it is designed to be mounted on the original connecting rod with the original cylinder head and camshaft. So you don't have to make any modification or adjustment ! You will find below a detailed list of vehicles on which this cylinder can be mounted.

Fits on:

YAMAHA YZ450F YZF 450 2010

YAMAHA YZ450F YZF 450 2011

YAMAHA YZ450F YZF 450 2012

YAMAHA YZ450F YZF 450 2013

YAMAHA YZ450F YZF 450 2014

YAMAHA YZ450F YZF 450 2015

YAMAHA YZ450F YZF 450 2016

YAMAHA YZ450F YZF 450 2017