Motorcycle Questions? Ask a Mechanic.
Hi Larry, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.Initially , a little more background info please:
Is the fuel fresh?
Still, proposed preliminary checks (if have not been done) on suspects:
I understand Larry and it would then point back to fuel delivery/starvation issue; still a carb problem.
Determine if bowl of the carb is full of fuel by loosening the drain plug (screw) and collecting the fuel through the drain hose.
In most instances, the carb would have to be pulled down (again), dis-assembled and all metal parts soaked in carb cleaner.
The objective is to ensure that all holes, ports, passages are clean and clear of varnish like residue that may be coating the walls.
In some others, it may even be necessary to use special brushes for the cleaning.
This is very significant Larry; no air filter and there would be a massive air leak / very lean condition. The carb needs the partial vacuum created by the restriction / air box/filter combo.
Please re-install and ensure that all air entry to the carb is through the designated opening of the air box.