Hey all, I have a 72 Yamaha CS5 that I am currently have troubles with. A bit of info, the odometer is at 1700 miles not sure if its true. I took the carbs off cleaned and replaced them, it has pod K&N filters new plugs wires and NGK resister caps. New left cylinder head gasket. I can't seem to get it adjusted just right.. The engine will fire and run but very poorly and needs a lot of throttle to stay running, it will not idle.. Pulled the plugs fired when set on the head. . I think my air fuel is off it backfired last time I tried to start it... What do you guys think?