I have a 2000 TW200 and am at my wits end with the carb.I've installed a new needle and seat and played with the float height but it continually leaks from the overflow. Tonite I checked the float height and it was just under 26mm from the carb body to the top of the float while holding it upside down.I adjusted it to approx. 27mm. and it leaked.Then I tried 28...it leaked.I set it at 29 and it still leaks.What am I doing wrong here? The bike starts and seems to run fine but if I don't shut the fuel valve off I'll dump the tank on the ground.