Quote Originally Posted by Thomas Armstrong View Post
My buddy bought it knowing it had a issue and from the conversation I heard with previous owner it was running fine and set over winter then started having this problem. Supposedly was taken to mechanic several times with no luck and the guy got tired of dumping money in it with no results.????? I'm just trying to help my buddy out so he doesn't get into a money pit.
I would check the easy stuff first, make sure that the throttle cam is working and both carbs are opening equally, make sure that the timing is set properly, and make sure that the cable is not bound up or something and only opening part way.

It would also be a good idea to run a compression and power balance test to see that all cylinders are contributing.