so I got a 2001 400ex on trade. Ran good just didn't idle for squat. I'm new to quads to boot but I'm mechanically inclined. Well the quad does weird things when I started it today I had it idling then it just started revving extremely high then it went down and wouldn't idle at all and die. Mind u I only have an aftermarket muffler on at this point the quad is still pretty much stock. I noticed it was leaking gas out the overflow but it still starts and when I drove it it bogged down at full throttle. I'm not sure what to make of this but I will say that the cable underneath the carb is broken. Idk what it is but I know its a cable that runs from an adjustable screw into the carb from the bottom. Is the cable important can it be causing this dilemma?