Whats wrong???

[spaz815]

So started my bike just now. When I was trying to start it it let out a loud back fire. Got it started and let it sit for 10 or 15 min to let it warm up. Well when I took it for a little ride it was making soft back firing every once in a while. Why would it do this? Please don't tell me its a big thing. LOL

 

[cyclebuster]

dont sweat it. many things can make a backfire. adjust your valves and points. maybe a mouse left you a gift on your exhaust valave seat.