Originally Posted by BC_Dan
First thought is lean bog caused by plugged pilot jets. Are the carbs spotless? Is it better if you apply the choke?
Second thought is a fouled plug, my 650 sounds like that when it fouls one. Check for spark as SonofIrishman suggests. It could also be a bad plug wire/plug boot.
How's the compression?
Ill check the pilot jets, no if i choke it its no better,. and 120+ in all cylinders
Thanks BC_Dan, ill figure it out