Hey guys. Im working on a 86 trx 70 for a guy and i can't get it to run right. it is running very rich, as its blowing a whitish smoke that is without a doubt gas. i cleaned the carb and changed the air filter. the air screw doesn't change anything on the performance of it running. now i can pull the oil dipstick out and it is very thin and smells like gas.. any advice?? thanks in advance