June 14, 20206 yr Hi everyone, I am new here, i ve just bought a beta evo 4t 300 2019 brand new ! I like the way it run, but i would appreciate your help. I ve tried all i know to make it stop leaking gas. Jetting is spot on i have 120 mj, 27.5 pilot, 2 1/4 fuel screw. Fuel was dripping from both tubes ( drain and vent bottom) i ve sealed the drain bolt with blue locktread and it worked. The bottom vent tube is dripping only went i ride and doing tricks motor on. I ve ajusted the float lower than paralelle to cure it ... ( less gas in the bowl) doesnt worked. When i route the bottom vent tube up , it become full of fuel and gas drip from the gas cap vent! When it s down the gas cap tube is dry but the skid plate is full of gas.... valve is positioned as the owner manual to c horizontal automatic.. I dont know what to do next to stop that carburator leaking ... anyone?
June 15, 20206 yr Surely this boils down to the float valve and seating. I can't remember if a neoprene seated valve would be available ?
June 15, 20206 yr Its new, take it back to the supplier and insist they put it right. Definitely a fault, my 4T doesn't leak. As rotors7 says most likely the float value. May well be just some dirt, but a bit of a pig to get the carb off so let the supplier sort it out.
June 16, 20206 yr You do have the gas valve in the correct position? It is going to leak a little doing tricks. If you block the vent tube, it is not going to run. Take it to someone that can fix it. You are making it worse.
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