mokwepa Posted November 5, 2013 Report Share Posted November 5, 2013 Hi How is the tank vent tube routed on your bikes? Ive always just tucked the little tube into the top of the tank cover but if I get a overflow, the fuel runs down the clutch hose and throttle cable causing dirt and dust to stick everywhere. What I did now was stick the tube into the carb overflow tube that is routed up under the tank cover. It should breath ok and if it overflows it will flow into carb and then flow out the bottom of the bike. Do you see any issues with this or how is your bike tube routed? Quote Link to comment Share on other sites More sharing options...
0007 Posted November 5, 2013 Report Share Posted November 5, 2013 The carb vent is not really a "Vent" it only needs to sense atmospheric pressure so float height can be consistent, there is not really a lot of air transferred through the hose The tank needs to slowly draw air so fuel can flow out to the carb or push air out in the case of expansion so pressure won't push the needle open, and in the even of an upside down it will puke fuel but that's not what it is intended for You shouldn't really have fuel getting into the carb vent hose, I'm not sure what effect it will have but it should be momentary if there is one Did you add a Tee to connect the tank vent to it? Quote Link to comment Share on other sites More sharing options...
gazzaecowarrior Posted November 5, 2013 Report Share Posted November 5, 2013 Sounds like a faulty fuel cap. Mine did exactly the same. I bought the billet racing tap from beta and problem sorted. There is a little spring valve in the standard cap which can either jam open and leak or jam shut and not allow gas flow. Hope this helps. Quote Link to comment Share on other sites More sharing options...
mokwepa Posted November 5, 2013 Author Report Share Posted November 5, 2013 Sorry I used the wrong terminology. I know its a vent just used the word overflow. I just pushed the fuel cap pipe into the carb vent pipe that is directed up. The vent pipe that is directed up is linked to the vent pipe going down, at least when I blew through it. Maybe ill just do the old school method and stick the fuel cap pipe in the top of the stem nut, just to be safe. Quote Link to comment Share on other sites More sharing options...
0007 Posted November 5, 2013 Report Share Posted November 5, 2013 I get it, I would disco that hose you did The vent needs to have a top and bottom for a couple of reasons most people won't believe LOL Quote Link to comment Share on other sites More sharing options...
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