I have just put one of RGM's folding kickstart (its a T160 Truimph kicker with Norton spline) on my Norton, it is longer and folds out of the way so now my kickstart don't sit in the back of my leg no more, am very happy with it and so far hasn't come lose on the spline like my old kickstart did (Nomaly after 3 kicks it would come lose) it has a better swing on the kick so makes it a bit easer to kick over the motor.
Ashley