Kit ATHENA BIG BORE Ø83mm 290cc for YAMAHA WRF, YZF, GAS GAS ECF 250cc from 2001 to 2012

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