Are these carbs seated right? Or worse..

Discussion in 'Mechanics Garage' started by RobVG, Apr 2, 2017.

  1. RobVG

    RobVG Member

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    '84 700

    Took it in once to get them synced. Was told they weren't seated right and didn't have it done.

    The first time I changed the air filter the lid barely fit. After I R+R the carbs it fit worse, can only get three screws in. My concern is the PO pulled the carbs up on the left side to get to fit and I'm looking at a bent frame.

    4.jpg c1.jpg c2.jpg c3.jpg f2.jpg f1.jpg
     
  2. Allyance

    Allyance Insider

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    I don't know what they were talking about, they look pretty good. Once the carbs are slipped into the rubber boots (hardest part) they should naturally want to slip down against the throats of the heads. I have had mine on and off many times, some times 2 or 3 times in the same day. If you are worried about it pop the air box off, loosen all the clamps and try and rock the carbs. The design is such they are happiest all the way down. Inspect again and tighten all the clamps. When I put mine back on, I seat the front carbs first, then use bar clamps on either side and gently apply pressure while I get the rubber boot over the leading edge of the rear carbs with a screw driver or tool, once that happens, apply a little more force and they pop back on. A little assembly grease on the rubber boots helps greatly.
     
  3. VFR4Lee

    VFR4Lee Member

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    Of course 33 year old rubber bits may be a bit petrified. :numbness:
     
  4. RobVG

    RobVG Member

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    They were. I replaced them with NOS.
     
  5. ridervfr

    ridervfr Member

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    there are little "ears" on most carburetors, they kind of give you an indication if they are seat based on the insulator bands being in contact with them, or the plenums from the air box. If it does'nt look right, then its not right.
     
  6. squirrelman

    squirrelman Member

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    You :cool: can say that, but only once among dozens of tries was i ever able to get my '86 700 carbs on without some struggle ! 2-3 beer job in the worst cases. :worked_till_5am:

    Danger lurks for the impatient tinkerer using old boots:

    IMG_1733.jpg

    IMG_1735.jpg
     
  7. Captain 80s

    Captain 80s Member

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    There is something going on there. The look "seated", but if you don't have them all oriented the right way, I can see how they have located the carbs more to one side. Those air boxes can be weird, but I haven't seen one smashed into the frame like that. I know you're trying to sell, but that would make me go back in otherwise.
     
  8. Allyance

    Allyance Insider

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    My boots were brand new, which makes a big difference. Sadly for some reason at my age, beer has lost some it appeal. They are always a struggle, the geometry dictates it. I just have gotten use to doing it, and it doesn't bother me any more. I agree that they should be centered, and it may appear that the right side is not fully seated. Again, loosen all the clamps try pushing them down again. Could also be just the airbox is not sitting right. Let us know how you make out. Take the airbox off and send us another picture.
     
  9. ridervfr

    ridervfr Member

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    Does that mean you switched to something stronger? :drinkers: I like to wait till after I conquer some mechanical FU before I celebrate with something, that's just me though. New insulator boots are the only way to go, if push comes to shove, you can break out your heat gun, I have heard that some people boil them too, not to be confused with octopus which I am thinking about cooking, (never did it before.) Keep us posted, when you seat them properly, you feel it btw.
     
  10. Allyance

    Allyance Insider

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    I still enjoy a good brew, got a 12 pack of Blue Moon in the fridge, but just don't feel the need to drink every day. Wife and I always had wine just about every night, but now not so much since we are divorced!
     
  11. squirrelman

    squirrelman Member

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    :pirate:

    Is it wrong to congratulate someone for getting a divorce ?? :loyal: :smug: Is that wrong ?

    Think of all the more time you can spend with your bikes now ! :tongue-new:


    Did i notice a missing carb band screw in the top photo ?
     
    Last edited: Apr 6, 2017
  12. Captain 80s

    Captain 80s Member

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    The boots have an engine side and carb side. And they need to be "clocked" correctly for the carbs to seat correctly, there are little "reliefs" in the boots for part of the carb and head to clear to verify positioning.

    Are you sure they are installed that way? It really doesn't look like it.
     
  13. TOE CUTTER

    TOE CUTTER Mullet Man

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    Picture # 4 gave me the same feeling.
     
  14. Allyance

    Allyance Insider

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    Was there a design change after 83? My boots were symetrical and there were no tabs to line up. I just checked my manual and there was no mention of any alignment required.
     
  15. Captain 80s

    Captain 80s Member

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    You're right. I went out and checked a VF750F motor in my shop before work. No "UP" markings or reliefs. I think I kind of remember that now when I was building the rain bike a couple years ago and thinking it was odd. The VF500 and 1000 has them. As well as the VFR700/750. Weird.
     
  16. ridervfr

    ridervfr Member

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    Mine say MT4 CARB on them. Dats all I know. I am still married, but when we met and we went out and about, I had a "Martini-Kit" along with a rolling suitcase with telescoping handle. Thats all over now, no more James Bond for me. btw - stirred not shaken! James was drinking weak stuff :loco: :drinkers: :madgrin:
     
  17. squirrelman

    squirrelman Member

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    Warren, again, with his shtick !! Good stuff and with Rickles gone we'll need more ! Pass the matzoh and the Mogen David, please.
     
  18. RobVG

    RobVG Member

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    I guess it's worth a shot to reseat them but goddamnit, I've done a lot of PITA jobs over the years and working on these carbs is near the top of the list.
     
  19. Allyance

    Allyance Insider

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    Just loosen both clamps on each carb and try and rock the whole assembly. If no movement is detected, the you should be OK. Retighten clamps. Take another picture without the airbox. No need to take them off again.

    Do your old boots have the notch or are they smooth on both faces?
     
    Last edited: Apr 8, 2017
  20. RobVG

    RobVG Member

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    Okay Allyance. So the consensus is there is no up or down to the boots?
     
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