so my bike was running and i drove it for about a week next thing i know the electric start wont work because the flywheel bolt came loose from vibration, i put loctite and tightened it up, now my bike wont start, its gettin spark, fuel, and the electric start works, but all it does is back fire from either the carbs or the exhaust, anyone have any ideas? Fresh gas, and new plugs were put in it today