me and my buddy just put a tb 132 kit in his xr 100, fmf exhaust 24mm carb and a kitaco inner rotor. timing and everything is exact but the bike wont fire. we were kicking it for awhile then it started to kick hard and sounded like grinding. checked the irk and grooves were worn into the flywheel and it was hard to spin. wen we put it in is it suppose to rub against the anything?? i havnt done an irk before so not to sure wat to do an we bought it used so no directions also bike is also only getting spark wen kicked hard