I’ve had most carbs that had to be set 1-1/2 or 2 turns. When I get on that needs 2-1/2 turns I think there’s something wrong with it.
You’re revving it wrong on the line up. I can keep one going all day standing still. If you hold it open a certain amount it will feed a ton of fuel. Pop it open and closed every 2 seconds don’t try to idle it higher with the pedal.
Gif
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience