This is the internal throttle fitted. It’s for 1 inch bars, but there was plenty of meat on the section that fits into the cut down handlebar. Plus these BMX bars aren’t very thick walled, Chro-mo, don’t you know! I made a slug to stuff in the end because the twist sleeve bit is ridiculously short. I extended the bars on the other side to match the new width using part of the bit I cut off from the throttle side.
My plan is to have just the brake hose and clutch cable visible, so it looks like the brakes on a BMX, if the BMX has two brakes, and massive levers.