The internal throttle control is back again, in particular for customizers that want a clean looking handlebar. For those in search of even cleaner looks we now have a matching twistgrip style internal clutch control kit. You will have to cut your handlebar and drill and tap 3 holes to install. Works with Custom made clutch cables. The inner grip rolls on two needle bearings, whilst the plunger features a very small roller bearing, all in order to get a very smooth operation. Has 1" (25.4mm) outer diameter and will accept stock size grips.