3rd Gen VFR leaking gas

Discussion in 'Mechanics Garage' started by braceyoself777, Aug 21, 2011.

  1. braceyoself777

    braceyoself777 New Member

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    Well shes starting to leak gas and I took the tank and air box off to take a look at it. The gas is leaking from one of the carbs joining fuel lines. If your not to sure what I'm talking about, its a brown T-line that supplies fuel to one of the carbs. Also that certain carb that has the leak in its line is probably not getting enough fuel is sputtering so I'm guessing its a vaccum leak also? I wanted to see if I could of done anything to fix it but it looks like its beyond my skill level. I'm going to bring it to my mechanic tomorrow so he can fix it. Any ideas guys?
     


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  2. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    fuel tube o'rings are major work. Carbs must be removed from the air plenum which means lots of little springs and fragile plastic fuel tubes to break.

    The service is not for the faint of heart.

    As an a side; while the carbs are off, I'd recommend changing the o-rings on the coolant crossover tube that runs from right to left in the valley underneath the carb assembly. It's a fairly simple service once the carbs are off and are prone to developing leaks on a 20yr old bike.
     


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  3. squirrelman

    squirrelman Member

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    Said you removed airbox to check, but did you remove the alloy airbox baseplate too ??

    Horrors !!!!
     


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  4. kennybobby

    kennybobby New Member

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    Has the bike been dropped on it's side recently or prior to your ownership--that's a good way to crack/dislodge the fuel tee's. Or have the carbs been off recently for service?

    The repair involves taking the entire carb rack apart, keeping track of all the parts, and use lots of lube so as to not force and crack tubes on reassembly. If you can check valve clearance or rebuild forks it is similar degree of difficulty...
     


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  5. braceyoself777

    braceyoself777 New Member

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    Yup, thats how I found out where they were leaking.

    The bike has been dropped by the previous owner but I don't think it will affect it because I got a rebuilt set of carbs put into the bike about 3 months ago by my mechanic and he wanted to put a jet kit on it but the bike wouldn't run right because of the California Cam's. The carbs were Federal but he took off all emissions crap. The bike ran fine for the 3 months of hard riding, but it started acting up now.
     


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  6. kennybobby

    kennybobby New Member

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    Almost 100% guaranteed

    to crack the fuel tees if the plenum plate is removed with the carbs on the bike...

    So do you have 2 sets of carbs, or just 1 that was rebuilt from a previously dropped bike?

    The BS meter is going off here on your mechanic--maybe he cracked them and patched it with RTV, which will eventually dissolve in gasoline. He should have warned you about pulling the plenum plate. Just saying.

    You have 2 strikes and a foul ball going against you here:
    1 a previously dropped bike,
    2 rebuilt carbs (bought off ebay from a wrecked bike? i.e. same as dropped)
    3 pulling plenum while carbs on bike

    One the other hand if you are lucky it is just a case of dried out orings and the tubes are fine, but that is highly unlikely...
     


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  7. squirrelman

    squirrelman Member

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    ......why i asked and what i suspected.

    Coulda been a float valve leak or dried out bowl gasket but got worse when plenum was pulled. It's important to remember that rubberish O-rings & bowl gaskets dry out and shrink (during storage) when fuel is not present and many times swell and seal after about 24 hours exposure to fuel.

    Usually a mistake not to read and study the FSM before plunging in, as in this case.
     


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  8. braceyoself777

    braceyoself777 New Member

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    Oh no, I'm not down grading your comment, I was just saying I took off the whole intake box....thats how I saw the leak :)
     


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  9. braceyoself777

    braceyoself777 New Member

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    Ended up just being a lose fuel hose clamp connect to the first hard fuel line connector....UGH I could of fixed it myself but I would of never thought it would of been the hose clamp :( ! I could of fixed it! Fortunately my mechanic is cool and only charged me $50. I called a shop ahead so I can get my bike the next day and they said it would be $100 to look at it and parts plus labor if anything occurs, it will be added on. lol Shops gotta stay open some how.
     


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