Well to start off my neighbor is having me look over his recon because it wouldn't start so I figured that it was his carb, which I was right...the pilot jet had fallen out so I put the jet back in and turned it all the way in and didn't turn it out any because I didn't want it to fall back out again...Now I put everything back together and was cranking it over for a while with nothing, then all the sudden a gun shot went off and when I say that I am being dead serious...my family and neighbors came rushing out seeing if I was ok...haha...So I stopped cranking it until I felt that it wasn't flouded any longer so went back and tried it again and baam the same thing...I am not sure if it is coming out of the carb or the exhuast because it scares the heck out of me everytime and can't tell where exactly it is backfiring...I took out the plug today and it was black as could be and was wet due to fludding it...My neighbor before me ran the battery dead trying to start it so I am not sure how much gas is in the engine...He was starting to get low in the tank, but enough to get the bike started and run it for a little while...So my question to you guys is what could be causing this? It has spark since I checked it and can tell it's igniting, but I think the pilot jet needs to be turned out about 2 1/2 turns and I need a new spark plug...any help would be greately appreciated and I think too much gas in the cylinder has to do with it backfiring (preignition).

 

someone has to have an idea, but I believe there is way too much gas in the cylinder because my neighbor was running the battery dead withough the pilot jet being in.