Moinsen habe ne EXC 250 2Takt Bj. 2000. My problem is the stationary gas adjustment. It runs very restlessly in the stand, sometimes it turns up quite high, then it goes out again because it runs too slowly. It does not react to the regulator screw at all. No matter if completely turned in or out (I currently adjust at the top of the gas handle with the knurled screw). The regulator screw is fine, neither broken off nor worn off and it also lifts the slider. It is a JD kit built in with blue needle (3. Clip), 45 LLD and 175 HD. Although it speaks to the idle mixing screw, I still don’t get a reasonable stand gas (1.5 revolutions open basic value). At 3.5 revolutions open it ran high touring, but like a sack of nuts. False air does not pull (have sprayed the area between the head and carburettor with start pilot). Carburettor is cleaned, air filter is new, nozzles and needle is also. In addition, it “nails” in the stand gas (every 3-4sec) and during exit/slide operation ( It’s hard to describe: Sounds almost like an early ignition. When you take off with the gear in place, there’s a real short jerk forward, then the whole moped is shaking in the stand gas.Listen to it…. and can’t be right. Above the stand gas is the greatest mopped of the world, pulls stripes to the horizon and at full gas the moon bursts. I soon have no ideas :-(( I am grateful for any kind of input).