handle bar slipping

[kawi101]

i have 10" z-bars that dont have the serations on the bar that are supposed to lineup with the bar risers and everytime i hit a bump the bars move even though ive tightened the sh** out of it, is there anyway prevent this from happening my last choice is to just weld them to the risers.

 

[PeterTrocewicz]

Strips cut from an aluminum beer can and wrapped around the bars under the clamps make great shims, or a dremel type tool can be used to cut your own serrations.