Your engine has tightened and you wish 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 reassemble your SUZUKI RM-Z 450cc 4 strokes of 2007. 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 it is Ø95.5mm which gives us 450cc. This kit will allow you to refurbish your machine and especially to have a quality cylinder as reliable as the original. You will still have a gain of power of 2hp or a total of 52.2hp by putting the kit ATHENA compare to the original engine which makes 50.9hp. 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, rings and all the spare piston dimensions so that you can keep your cylinder as long as possible. Below you will find a list of vehicles compatible with this kit.