Motorcycle Repair: 1985 honda, honda 200s, vent holes


Question
i have a 1985 honda 200s 3 wheeler . gas flows thru the carb flooding the engine . i cleaned the carb and it does the same thing . after taking it off the 3rd time there didnt appear to be gas in the bowl, also the gas was coming out just one hole on the rear of the carb

Answer
Ron, ATV/ATCs are not my regular bike thrill and I have stayed away from them, for the most part.

Basics, however...  You need to establish the the float valve is closing the the float isn't sinking or out of adjustment. If you use carb cleaner on the float needle it may swell up and stick in the float valve seat. That would account for no fuel in the bowl. Blow through the fuel line with the bowl off and see if the float is opening and closing off, properly.

http://www.bikebandit.com/parts/Honda/ATC200S/1985
Go to carb page...

This shows us that the carb float appears to be plastic, but some have adjustment tangs and some don't. Can't tell on yours, so just try to eyeball the float when the needle is just closing into the float valve. The float should be about parallel to the carb body.

Be sure that number #2, next to #16 is still in place. Sometimes that needle jet drops out when you remove the main jet holder and you don't miss it until it starts gushing fuel down the carb throat. It will be just above the floor of the carb throat with the beveled end towards the needle. The flat end goes towards the main jet holder/emulsion tube which holds it in place, in the carb body.

Make sure that the carb float bowl vent in the roof of the float chamber is open. These are small passages, but the vent system has to be open to equalize the pressure in the bowls. If it is plugged, the float chamber will overflow immediately.

Be sure that the air vent holes in the carb throat are clean and open, so they can inhale some air to mix with the idle and main jet circuits.

Bill Silver