ok i got a honda 1983 200m that seems to b giving me some trouble. evry now and then the damn thing will sputter and fart and pop and stall. then wont start for around 20 min. ive cleaned the plug, put in a new one, cleaned the air filter and i dont know wut to do next. but the thing run perrrfectly in the winter time. just not in the spring summer or fall. should i chance the oil type. by a new carb? plz help me out it would me might appreiciated.