[sarnali2]

sounds like lean surging, probably an intake air leak. Tighten all the clamps that hold the carbs to the manifold and the manifolds to the head. Check for loose or missing vacuum lines or plugs.

 

[sarnali2]

Possible gunk in the carbs also. He didn't say he cleaned them lately. Time for a good acid bath soaking?

He had the valves adjusted AFTER the carb synch.....if you adjust the valves you need to re-sync the carbs, also something probably got knocked loose or not tightened enough.

Most probably stuffing a few dryer sheets in the airbox would do, the acid bath treatment is only for newer bikes or after an air filter change...