Hey there folks, I need some advice from someone. Saw this site and thought "who better to ask?" My TLS seems to be backfiring through the airbox, itS done it a few times but only when dropping cogs quickly. It's done once strong enough to pop the two halfs of the apart enough for about an eighth inch gap to appear. The previous owner fitted a K&N but don't see how this could cause it. Is my bike the spawn of satan and turning itself into a bomb or what?HELP!!!!!