Your engine has tightened and you want to start again on a quality engine so that you don't have to dismantle it so soon ? Then here is the complete engine top proposed by ATHENA to rebuild your HONDA CRF 250cc R from 2014 to 2015 in 4 strokes. This kit is sold complete as on the picture with its axle, clips, ring, piston, gasket and its cylinder. This kit is not a big bore, it has the same characteristics as the original. You will not have any performance gain on your motorcycle by refurbishing it. It is of course of excellent quality as usual at ATHENA. The nikasil is really of excellent manufacture to guarantee you an increased reliability. We also have all the seals, ring and all the piston dimensions of replacement so that you can keep your cylinder as long as possible.