'86 VF500F main jets

Discussion in '1st & 2nd Generation 1983-1989' started by creaky, Aug 1, 2011.

  1. creaky

    creaky New Member

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    Need help from the experts. I am in the process of cleaning up a set of '86 VF500F carbs, 49 state model. The manual states that the main jets should be # 90, all 4 carbs. The carbs for cylinders 1 & 3 are fitted with #92s, the carbs for cylinders 2 & 4 are fitted with # 95s. I need some clarification here. Are these jets fitted because they provide a performance improvement? Or, has someone screwed up and fitted the wrong jets?
     


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  2. invisible cities

    invisible cities New Member

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    Could be:

    [​IMG]

    [​IMG]


    Not sure why FP has the '86 setup this way but they do.


    For reference:

    VF500F Carburetor Specs

    '84
    Model No. VD56A - 32mm Throttle Bore, 6.2mm Float, 102F/105R Main

    '85
    Model No. VD56D - 32mm Throttle Bore, 6.2mm Float, 90F/90R Main

    '86
    Model No. VD31AB - 30mm Throttle Bore, 7.3mm Float, 90F/90R Main
     


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  3. creaky

    creaky New Member

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    Thanks for the info IC. I will assume that the jets will work OK and put them back in. BTW, the slow jets are the stock #35s. The carbs were pretty gummed, photo attached.
     

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  4. invisible cities

    invisible cities New Member

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    Yikes!

    [​IMG]
     


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  5. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    that doesn't look like gummed up, it looks like corrosion. something appears to have been run through the carbs, possibly for storage, that turned out to be a problem for the brass parts.
     


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  6. creaky

    creaky New Member

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    The stuff was kind of gooey, black with a little green mixed in, but cleaned up pretty well considering.....
     

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