No fuel in carbs + fuel leak (overnight)

Yes. The larger one, with the obvious kink and the inline fuel filter, is the fuel supply to the carbs.

The cut hose is the "signal" hose that operates the diaphragm/valve inside the petcock allowing fuel to flow when activated.

If you get a taste of gas from sucking on the vacuum line then the diaphragm is compromised. There should never be any fuel in the "signal" hose.

Petcock tech: http://xjbikes.com/Forums/viewtopic/t=25058.html

 

great I`ll check that !

(there was a kink in the fuel hose because I lifted the tank to have a better vieuw)

Thanks for the Petcock tech and all the info

 

I think my carbs indeed needed a good cleaning !





<a href="http://www.casimages.com/i/140528025816424602.jpg" target="_blank" title="upload image"><img src="http://nsa34.casimages.com/img/2014/05/28/140528025816424602.jpg" border="0" alt="hebergeur d'image" /></a>
<a href="http://www.casimages.com/i/140528025816802419.jpg" target="_blank" title="upload image"><img src="http://nsa33.casimages.com/img/2014/05/28/140528025816802419.jpg" border="0" alt="hebergeur d'image" /></a>

I had to use a hammer and hit hard to get the needle jets out !

Q/
I`ve got some Bardahl carb cleaner, but it`s 15$ for a small can and I would need 4 of them to soak my carbs !
Wouls some generic "garage degreaser" (not for the floor but the tools) be ok ?

 

one of my needle valve set looks like that



I suppose it`s got to be replaced...