Good question Steve............I like the cut of your jib

Superbike and Supersports currently allow quickshifters to be fitted.

I believe that FIM Superstock allow them too.

However MCRCB Superstock only allow a quickshifter if it was orginally fitted by the manufacturer.

For the TT MCRCB Superstock rules apply

I've just looked it up it takes about 3 different downloads to find out and I'm right in what I say