Usually a spring loaded screw, often vertical...turn it fully in, then out by one turn. Don't confuse this with the throttle stop screw - a mechanical device that actually holds the throttle slide in the open position.
John
March 2008
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix motorcycles.