My Quad sat for a little and would start but would not stay running. I cleaned my carb and changed the spark plug. originally it was revving high so I took carb back off and got a kink out of the throttle cable and messed with the idle screw a little. Then it wasn't getting enough gas to stay running so I adjusted it again. Now it will stay running and will rev up and rev down by itself just a hair at idle. I adjusted the throttle cable where it threads into the throttle box at the handle bars and its either too much or not enough. The throttle is stuck so if I let off the clutch it will just go with not pressing the gas and bogs out 3/4 of the way of full throttle...it is also smoking sometimes from my exhaust or where the mid pipe is clamped together.