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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> Bike isn't pulling fuel
Post Info TOPIC: Bike isn't pulling fuel
Capitalcrew


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Bike isn't pulling fuel
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Hey there. I recently got a ttr250 from a friend that has been sitting, i replaced the diaphragm, the two orings next to it, the seal for the float bowl, cleaned the jets, cleaned the little hole from the diaphragm into the float bowl, cleaned the routes to the side cover and the jet into the carb from there.  Bike runs well on fuel poured into it but will not suck fuel on it's own. Pet**** has been cleaned as well. I'm at a loss. 



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ERBS


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Try cleaning out the fuel tank if you not already done this

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yamaha42


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Sounds like your needle and seat is sticking.

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Capitalcrew


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I thought that as well, cleaned it as best i could. It definitely works and allows liquid passed with the bowl off.

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TTRfan


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Does petrol come out if you loosen the drain screw at the bottom of the float bowl?

That would at least show if fuel is flowing through from the tank.

Brian



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Capitalcrew


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The drain screw it set up solid. Fuel does go through the pet**** and the line if the line is off of the carb.

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Cubber


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Sounds to me like the carburettor needs looking at. 

If it's been neglected for a few months then it may be gummed up by sediment and dross from old petrol.

Modern ethanol additives in petrol are hygroscopic and are known to attract moisture.
This petrol has also been found to "eat" certain metals and plastics.

I'd recommend a complete carb. dismantle, clean (ultrasound bath?), check and reassemble.

Martyn

 



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JDM_stig


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does it suck fuel with the fuel filler cap off/loose?


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Aussie Paul


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My bike had been sitting for 8 years. I cleaned out the carburetor ( or so I thought ) but it would still not pull fuel.. I found I had overlooked the tube into the carburetor (as per pic) It was totally blocked full of sediment, from what I don't know. maybe just the fuel turned to crap. Maybe because I never turned the petvalve off (proper word would be blanked out smile) when I last rode it.

worth a checkIMG_1275.JPGIMG_1277.JPG



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