Your engine has tightened and you want to start again on a quality engine so you don't have to dismantle it soon ? Then here is the complete engine top proposed by ATHENA to reassemble your KAWASAKI KX 125cc 2 stroke from 2003 to 2007. This kit is sold complete as on the picture with its axle, clips, ring, piston, gasket, cylinder head, screws and its cylinder. This kit is not a big bore, it has the same characteristics as the original it is Ø54mm which gives us 125cc. This kit will allow you to refurbish your machine and especially to have a quality cylinder as reliable as the original. However by taking this kit you will still have a gain in performance compared to the original. You will go from 34.2hp with the original top engine to 35.5hp with the kit ATHENA. Attached is the power curve so you can see for yourself the difference between the original and the kit ATHENA. 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 gaskets, ring, cylinder head and all the piston dimensions for replacement so that you can keep your cylinder as long as possible. Below you will find a list of vehicles compatible with this kit.