Motorcycle Questions? Ask a Mechanic.
Hi, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, have you drained tank and replaced with fresh fuel?Could you please check and post back with the burn color of the spark plug tip?And have you checked/ensured that the air box and filter are fitted correctly with no possibility of an air leak?
Can you try checking the spark plug burn color?
It would helps us narrow down suspects; lean, rich, air or vacuum leak.
I understand and would look forward to an update tomorrow or when able.
Appreciate the update / information.
With fresh fuel and all others that have been tried/done, it would appear to still be a fuel delivery/starvation issue.
Let's go back to the basics, dis-assemble the carb (again if necessary). Soak and clean all metal parts using a solution similar to the product shown HERE.
In some instances, it may be necessary to use special cleaning brushes such as those featured HERE.
Of particular interest would be the bowl, float height and float needle & seat condition.
Please post back results / observations of the above once tried.