Hi everyone this is the first time I have had to post something on here usually someone else has the same problem thats already been answeared, This place has a wealth of information. I just finished putting together a '92 250x. It sits and idles fine hot or cold, and at high rpms in any gear it also runs fine. when I hit the throttle at low rpms it bogs down and sometimes even stalls I have cleaned the gas tank, carb, (twice) and put a brand new oiled air filter on it. If the choke is on half way it runs like a dream, nice and responsive when I hit the throttle. I'm not sure what to try next air screw, needle valve, too much oil on the air filter?