A Question Of Sprockets Camshaft

[ELSANTO]

A Question Of Camshafts

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Hi all,i have a zx6r 2008,i just get the kawasaki racing camshafts,and the thiniest gasket head(.45),but i look that in this model,kawasaki racing dont sell the sprockets,so i think that i have to use the originals,correct?,so i checked the original sprockets and i look that it have doble IN marks,and doble EX marks,i know wich is the original position,so my question is,why it have another marks?,when the others marks use it?,anyone can tellme how can i put the best grades on my camshafts?thanks and sorry for my bad english.