I have had this issue constantly, Redcat really needs to look into this. I went through three whole clutch assemblies and a crankshaft. I had the screw break off on mine too. The last one that I put on with the new crank, ofna aluminum clutch shoes, gold springs it is seeming to hold up but, I don't want to speak too soon. I was just checking it out today and it looks like the screw is starting to bend cuz when I turn the motor over I can see the screw is not spinning true, AGAIN!!!!! I have put maybe 6 tanks of gas on this particular assembly and it is already showing bad signs. When my last screw broke off, I noticed that it was kind of wobbly when it spun. I didn't know it was bad because I thought that since the sleeve that goes over the screw protruded out of the clutchbell by about 1/8" and the sleeve might not be cut exactlly flat. Maybe I am wrong but, when I rebuilt everything this last time, the screw was spinning true. Someone PLEASE help us.. I have spent over 70 bucks now (just in clutches) and I dont want to spend anymore..[:@]