did you remember to tighten all the boltsone of the bikes i had a few years ago started to vibrate,which caused it to snap,maybe`s thats what happened to yours,ps how did you manage to get 70 out of your bike,
i have never removed the bolts probably the tw@ who had it b4 me i only bought it a fortnight ago ,unrestricted it did about 75 uphill!!, after earthing the green wire it does about 80,i should be getting a dep exhaust for it next week so ill let you know how it goes!
im also getting it sprayed next week so ill post some pic's