I just did my first motor bike conversion and I'm thrilled with how much fun and economical it is. However the clutch is excessively hard to disengage with the clutch lever. I already broke the one that I received with the kit after only 2 days of use ! The aluminum snapped right in half, and I have since replaced it with another handle that is just as stiff to operate. Any tips for loosening it up? Thanks in advance!