Seems there has been some discussion on this here https://cbrforum.com/m_70632/tm.htm

 

I used a 'vista-cruise' and modified it. Had to cut off the little tabs on the bottom, the drilled carefully into the throttle cable housing, used a small screw cut to a short length, countersunk the screw head into the vistacruiseand loctited it. works great and looks factory. All my buddies have it, if a new guy gets it done I'll document it better.

I would post pics, but it is all so small and black and the grip covers it so I'd have to undo everything at this point and probably f it up.