I've locked this board so it is available for reference only. The active forum for the site can be found here: http://vsgt.aforumfree.com/index.htm
Its sucking air somewhere via bad gasket on the carb, or lose or worn throttle shaft..Or possible a bad head gasket...Or your mixture is to lean and its surging do to that..
thanks, I will readjust the carb tomorrow after work.