thanks for the help guys. firstly, yes there is a little smoke, but only as much as there should be imo. the jetting has been very simple and luckily not too dependant on weather and all that, so its normally runs excellently. today i bought new fuel tubing, and a new tank seal too. the carby is VERY tight in its crankcase sleeve, havent yet checked the cooling head yet. tomorrow(raining today) ill put the new bits on and check the motor.

oh and another, hopefully unrelated thing. i still use traxxas' ez-start for cranking, not the glow plug tho, and every 4th or 5th start i have to take out the one way bearing and clean it of fuel. slips alot. is this common. it seems if the fuel is coming through from the bearing, not from outside the ez-start casing. again thanks for your help guys.