It happened after a mechanic serviced it. ( carb cleaner was used). One change he did which im aware of is changed the jet from 80 to 92.5. I know its stock number but problem came after that. What Else he messed up in carb, im not aware of.
At cold, engine bog effect is more severe but doesn't go away on hot engine.
Can you tell which type of power valve mehran use from following pic.
