cabby Posted December 17, 2016 Report Share Posted December 17, 2016 It seems my aux tank on the front of my bike doesn't seem to be syphoning in tot he main tank, now I'm sure it's something simple so simple that I can't see why not. Any help ?? Quote Link to comment Share on other sites More sharing options...
spen Posted December 17, 2016 Report Share Posted December 17, 2016 Is it air locked? Have you taken the cap off to vent it? Kinked pipe? Quote Link to comment Share on other sites More sharing options...
cabby Posted December 17, 2016 Author Report Share Posted December 17, 2016 Have you taken the cap off to vent it? The cap has two tubes, one filler, one vent. Quote Link to comment Share on other sites More sharing options...
cabby Posted December 17, 2016 Author Report Share Posted December 17, 2016 I should say, I just assumed the aux tank would automatically fill the main tank, but it hasn't, is there something I'm not doing ?? Quote Link to comment Share on other sites More sharing options...
jonnyc21 Posted December 17, 2016 Report Share Posted December 17, 2016 Have you checked that tank, vent and filler tube are not blocked or have an air leak? If they are fine then the next thing to look at would be the main tanks cap and seal, if it isn't sealing well your not getting the suction you need as the fuel drains from the tank to create the syphon you need. They are a really basic system so the only other option would be if you don't have the needed volume in the main tank to get the syphon started?... Good luck. 1 Quote Link to comment Share on other sites More sharing options...
cabby Posted December 17, 2016 Author Report Share Posted December 17, 2016 It's brand new aux tank so there shouldn't be an air leak, there isn't any block or kink. Main tank cap and seal is a possibility. I wasn't aware the main tank needed a certain amount to get things started but if not full was "fairly" full initially. Quote Link to comment Share on other sites More sharing options...
reggie Posted December 18, 2016 Report Share Posted December 18, 2016 Perhaps you have the two hoses on the aux tank mixed up. Quote Link to comment Share on other sites More sharing options...
jonnyc21 Posted December 18, 2016 Report Share Posted December 18, 2016 It isn't really about fuel volume as much as lack of air volume. The less air the more affective everything gets started, the more air you have the longer it takes to generate the needed suction. Quote Link to comment Share on other sites More sharing options...
andy0101 Posted December 18, 2016 Report Share Posted December 18, 2016 how about checking the non return valve is on the vent line and is flowing the correct direction Quote Link to comment Share on other sites More sharing options...
richt Posted December 18, 2016 Report Share Posted December 18, 2016 (edited) Is the dip tube inside the aux tank fitted correctly? and if so its that one that should be connected to the main tank. Edited December 18, 2016 by richt Quote Link to comment Share on other sites More sharing options...
cabby Posted December 18, 2016 Author Report Share Posted December 18, 2016 It's all part of the kit, main feed hose in aux tank then to main tank cap. Breather just comes from aux tank cap. Quote Link to comment Share on other sites More sharing options...
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