backfire

My 07 610SM was running great. I parked it for two days and it would not start. No spark. I replaced coil. But, no help. I took the bike in to local Husky shop and replaced stator. No help. Replaced ECU under seat and bike would start, But the engine would not rev up and backfired. I read about...

I just recently purchased a used 07 smr 510 it has 4000 miles on it and i got the receipts from all dealer maintenance including oil changes and valve clearance checks which were done 200 miles ago and after 2 weeks of riding it it stalled out on the road. The battery was dead so i replaced...