:doah: Oh... I am not caught up to speed here at all.. :lol:
Yeah sounds to me like you just aren't adjusted right.. Start by getting the engines idle speed set right.. The screw on the side is idle fuel.. When the engine is idling slowwwwwwwwly turn the screw in to lean it out... Lean it out until the engine reaches the highest rpms it will run.. If ya go TOO far it will stumble and miss and starve for fuel.. Back it back out to where ya started and go in again until you hear the rpms get back to running great.. That is where the idle fuel wants to be :thumbsup: then ya just use the throttle stop idle screw to set the idle speed again..
After that there is the matter of high speed (the bottom screw) that one I just grab the throttle plate on the carb and crack it wide open right there at the carb. If it coughs right out and dies it's good chance it's too lean.. If it stumbles and hesitates getting to speed and never gets to that high rpm range where ya have to shut it back down because you are afraid it's going to blow up

hmy: it's probably too rich... You can also hold the throttle open to point the sounds like it's at top speed and slowly adjust the screw by sound as you would the idle screw.. :wink: That all requires two hands and the chain being taken off the bike though.. :doah: If it only idles with choke on it's probably the carb not being adjusted right.
Keep us posted... I would also recommend yanking that steel snowblower air cleaner thing off and using the lawn mower one like you mentioned. Just remember to ream that hole out in the plastic base just a little, so the choke butterfly doesn't hit it.. :thumbsup: