I know there are at least two types of kickstart levers, MKIII and earlier. MKIII does give better leverage but won't work with my typical Dunstall rearsets so I bought a earlier style one and it worked but it is (was) a Emgo aftermarket one that is junk, never stayed tight & is at least 3/16" thinner so it doesn't cover enough of the shaft & came loose and ruined it's inner splines. Now Im looking for "real" Norton ones and think there are two pre MIII styles. Is tis true? Trying to decide on whitch one will work best.