so, i called to kawasaki germany (not i but my friend), i wantet to know, if my engine is a kit engine. zx750JE1008696. they said, they don´t know. so what for options, did i have.

Your Engine is a normaly with max 100PS. You have a ZX750J !! With a Kit you have a ZX750K

oh no, all engine numbers are zx 750 JE,

grettings kyelt

Well - the K Engine should have doubled valve springs as the L model has - an ordinary J Engie only has singles.