this is a common fault with the 05 onwards magura hs33s due to a combination of them removing far too much material around the clamp, and users over-tightening the clamp bolts ( vbolts should be tight enough so that the lever will move when a fair amount of pressure is applied , eg in a spill ) The only possible bodge would be to either bolt it to your bars...which isnt practical in any way, and would weaken your bars considerably; or simply tape the lever onto the bars. good luck