Took the wheeler out in the hills today for the first time this summer and it wouldnt run more than 1/4 throttle without trying to die on me,even backfired once seemed worse on up hill inclines.I pulled the plug and it looks like a lean condition to me(please tell me if Im wrong).Is there any way to adjust the lean/rich on these carbs?PO told me he rebuilt the carb a few months ago and I doubt he had a clue what he was doing.Any advice appreciated!Thanx

 

It looks way too lean to me. I used to have an '01 but I don't remember where the adjustments on the carb were. The only thing I did was adjust my idle. Sorry.

 

I took the carb apart,cleaned everything and turned the little air screw out to 2.5 turns(got that setting of another thread) i think it was at about 2 turns when I checked it,it was far enough in the point of the screw was sticking up through the inside of the carb a bit,new spark plug (gaped at .028) and put everything back together.It seems to run better but it was running good before today so who knows!Also Im wondering if Im missing a part,on the opposite side this little tube is covered with a rubber plug,should this side have one also?

 

The fuel/air screw just mainly controls the idle mixture. Should be between 2 to 2 1/2 turns out. One side of the carb should have a clear atmospheric vent tube and the other side should have a rubber block off plug.Seems each year they changed vent tubes around on the carbs.