Hi All, I have an OKO 26 on a Zonschen 140cc it has a 36 pilot and a 100 main as supplied. It runs well right through the rev range but seems impossible to get to idle properly. Regardless of the pilot jet fitted (have tried everything from 36 through to 48). I get it to idle properly then crack the throttle slightly but when releasing the throttle it continues to rev and won't go back to idle as if it is running lean. The slide is not sticking. Any ideas?