Here is the big bore kit proposed by ATHENA to increase the displacement of your motocross / enduro YAMAHA YZF 250cc 4 stroke from 2001 to 2007 / YAMAHA WR-F 250cc 4 stroke from 2001 to 2012 . GAS GAS ECF 250cc. This kit in Ø83mm against Ø78mm of origin thus allows to pass your motor bike of 250cc has 290cc! A gain of torque and performance will be immediately felt. It allows a gain of 3 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 any modification to do ! Here attached the power curve so that you can see by yourself the difference between the original and the big bore. You will also find a detailed list of vehicles on which this cylinder can be mounted.
Fits on:
FANTIC TF250ES 250 2015
FANTIC TF250ES CABALLERO 250 2014
FANTIC TF250ES CABALLERO 250 2013
GAS GAS EC 250 F 250 2015
GAS GAS EC 250 F 250 2014
GAS GAS EC 250 F 250 2013
GAS GAS EC 250 F 250 2012
GAS GAS EC 250 F 250 2011
GAS GAS EC 250 F 250 2010
GAS GAS EC 250 F REPLICA CAMI 250 2014
GAS GAS EC 250 F SIX DAYS 250 2012
YAMAHA WR 250 F (CG11) 250 2002
YAMAHA WR 250 F (CG11) 250 2001
YAMAHA WR 250 F (CG16) 250 2004
YAMAHA WR 250 F (CG16) 250 2003
YAMAHA WR 250 F (CG22) 250 2005
YAMAHA WR 250 F (CG24) 250 2006
YAMAHA WR 250 F (CG26) 250 2007
YAMAHA WR 250 F (CG30) 250 2014
YAMAHA WR 250 F (CG30) 250 2013
YAMAHA WR 250 F (CG30) 250 2012
YAMAHA WR 250 F (CG30) 250 2011
YAMAHA WR 250 F (CG30) 250 2010
YAMAHA WR 250 F (CG30) 250 2009
YAMAHA WR 250 F (CG30) 250 2008
YAMAHA YZ 250 F (CG10) 250 2002
YAMAHA YZ 250 F (CG10) 250 2001
YAMAHA YZ 250 F (CG14) 250 2003
YAMAHA YZ 250 F (CG18) 250 2004
YAMAHA YZ 250 F (CG21) 250 2005
YAMAHA YZ 250 F (CG25) 250 2006
YAMAHA YZ 250 F (CG27) 250 2007
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