I thought my throttle was getting a little hard to turn/return. So I loosened the end bolt that secures the guard and tried to get a little light lube inbetween the bar and the throttle tube. Then I did up the guard bolt. Problem. The throttle stuck. Turns out the bar has a split and when I tighten the bolt in the end of the bar for the guard, it expands the bar inside the throttle tube !! Has anyone ever seen this before? I have not. I did not over tighten the bolt at all. So some gorilla has worked on this bike at some stage. I havnt taken it apart yet. Im hoping I can get a small weld on the outside of the bar along the split and grind back. The things you find !!