Hey everyone. this is my first time on the site. i have just bought my first 1991 NSR250 off a friend for $500 AUD as he could not get it working. after tinkering for a few days i have managed to get it starting and running but will not idle at all. i was wondering if the is and idle adjust screw or some other things i should be looking at to solve this problem. and help would be greatly appreciated and i apologize if this is a dumb question