Went to hang a eBay helix clone exhaust on my new to me helix and then things went south. Found only 3 bolts holding the old one on, not 4. Figure out what I need, find one and continue on. Try to get the front upper one on, the one that bolts thru the swing arm into the threaded hole in the crankcase,but the threads won't bite. Take the exhaust side swing arm off and find an oval bolt hole. Now my guess is it's time to pop my heli coil cherry and put a insert into the crankcase. If ya got any tips, I'm all ears. Does autozone or o'reilly carry helicoil inserts?