Fuel leak in 91 VFR750

Discussion in 'Mechanics Garage' started by BillWill, Dec 10, 2013.

  1. BillWill

    BillWill New Member

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    Moved my bike into the basement and after 2 years finally got it back out so I can ride again but when doing a good cleaning of fuel system found that I needed to rebuild carbs as well. Ordered a new/used one off ebay already rebuilt and found the same issue I was having with mine which is fuel streaming out of my carbs. Finally identified the source and I think it can be fixed with a new o-ring but wanted to see if anyone else had some additional information as it seems the fuel delivery pipe is just held in place by the sheer force of the carbs themselves through tension. Anybody have some additional information as this I think is the last thing I need to resolve before I can get back on the road again.

    Uploaded a couple of attachments showing what I am having issues with:

    1. shows the actual delivery pipe or whatever it is called (yes one o-ring is missing as it was cut off for sizing of replacements)
    2. one pipe removed but a second remaining to show location
    3. side view of carb showing location again
     

    Attached Files:

  2. kd4ysi

    kd4ysi New Member

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    i would just take the piece to a local auto parts store and have them match up the o ring because if your luck is like mine the part youll need will be discontued i had to go to advance auto parts to buy a upper radiator hose for my 4thgen vfr today
     
  3. TOE CUTTER

    TOE CUTTER Mullet Man

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    The factory parts are not that expensive and the need to mess with it again because of incorrect parts is enough to justify the cost a dozen times over. Here is a link....looks like aboot $80 bucks for tubes and seals for every stuff.

    http://www.ronayers.com/CARBURETOR-ASSY-90-93-C186693.aspx
     
  4. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    The plastic piece of shit tubes are brittle and fragile with age. They are prone to cracking and can be damaged in reassembly.

    So I believe Toe is recommending you replace them as well.
     
  5. ridervfr

    ridervfr Member

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    Money well spent as you wont have to be devling back into the carb-grandness of the vee-four again.
     
  6. squirrelman

    squirrelman Member

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    Possibly the same O-rings as fitted on VF500s, and there are many posts about them, including reference numbers for autoparts store or local bearing distributors. Best to find best metric size if available. I'm sure Toe's right about replacing tubes while you can, but money don't grows on every orange trees like in California.:pirate:
    Rings sourced locally will set yo back about $2, or about $1.50 less than a beer in a bar. :party2:

    Fuel tubes seem to grey and discolor before they get old and may crack.
     
    Last edited: Dec 10, 2013
  7. kennybobby

    kennybobby New Member

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    Heart of Dixie Georgia Boys mighta been usin' dat
  8. ridervfr

    ridervfr Member

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    Too bad they are off the plate, now you have to re-rack them, and synchronizing is a must.

    I heard the roads are paved with gold in Buffalo. :wave: ice-hunchin :smile:
     
  9. squirrelman

    squirrelman Member

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    Only where something peeed or a Harley rolled past.
     
  10. TOE CUTTER

    TOE CUTTER Mullet Man

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    There is not a snow balls chance in hell I would reuse those pipes if they were available. Have way to many fugly stories aboot cracked tubes.
     
  11. BillWill

    BillWill New Member

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    Toe Cutter..... Definitely will pick up the new parts as they are a no brainer at that price, thanks.

    The pictures I took are of my original carbs that are now on the bench as the replacement bought from ebay are on the bike but regardless, we have to take the carbs apart in order to replace the o-rings and fuel tubes.

    KennyBobby..... no, we did not go through all the internals or at least not yet.
     
  12. squirrelman

    squirrelman Member

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    Unridden bikes usually have better-looking fuel tubes cuz liquid fuel damages plastic with long exposure, while seldom ridden means less exposure since fuel dries up, less likely to whiten then crack from brittleness ?? Aren't most tube crackages caused when carbs are removed if the airbox base was taken off ?? Darker tubes r closer to new and most likely OK to reuse. New ones cost more than several of 6-packs, by darn, remember ? :party2: :drinker:
     
    Last edited: Dec 11, 2013
  13. ridervfr

    ridervfr Member

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    it pays not to be an accountant when doing this work. There was a saying that my father told me regarding lawsuits. Just have a big eagle fly over and shit money on it, same can go for restoring/refurbishing these kind of bikes.

    Nuff-Sed, would have gotten that as a license plate if some sodamite didnt already have it. :wink:
     
  14. Badbilly

    Badbilly Official VFRWorld Troll Of The Year!

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    Sodamite: A Texas harleydood drinking a bottle of Big Red.
     
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