Throttle grip aids

FCR carb kits for Ducati Superpsorts come with a short throttle tube. I like longer grips so I made an extension for the tube. The flange of the new grip also dragged on the housing so it wouldn't close. The shim and the tube keep the grip from dragging.

The rib on the shim faces the grip. The tube extension has a bevel on one end but it isn't as pronounced as I thought so it probably doesn't matter.