Hello, I just got a 2000 CBR 929rr for christmas from my loving wife. It was running fine when she first gave it to me a couple of weeks before christmas. Now the last time I tried to crank it it was backfiring alot so I cut it off and let it sit and then tried to recrank it and it would not crank... It has a full M4 exhaust, sprockets and other than that stock except cosmetic stuff.... I was wondering if a PCIII would fix the problem but that doesn't deal much with the starting factor does it? Thanks in advance for any info.