Need Help With A VF500F 86

Discussion in '1st & 2nd Generation 1983-1989' started by Juggernaut1985, Apr 9, 2012.

  1. Juggernaut1985

    Juggernaut1985 New Member

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    This is whats going on my bike will not run. I changed the spark plugs, Made new plug wires and tested the coils they where good and fixed the petcock that was leaking and a new battery and dismantled the carb's and cleaned them but still no go any ideas that will help or suggestions to point me to the cause i really want to ride it.
     
    Juggernaut1985, Apr 9, 2012
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  2. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    "does not run" is pretty vague. More detail on the symptoms is needed.

    Many people fail to get the carbs cleaned properly the first 3 or 4 tries.
     
    tinkerinWstuff, Apr 9, 2012
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  3. Juggernaut1985

    Juggernaut1985 New Member

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    Sorry the bike will crank over but will not fire or start up, i dismantled the carbs fully and cleaned each of the jests it started once but when i shut it off and tried again it wouldn't start again.
     
    Juggernaut1985, Apr 10, 2012
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  4. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    the jets are not what get clogged and prevent bikes from running right or at all.

    there are air passages in the front and from the brass tube in the float bowl that is pressed in. This is the hardest one to get clean. You have verified that the plugs are firing?

    [​IMG]
     
    tinkerinWstuff, Apr 10, 2012
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  5. AlexVF500f

    AlexVF500f New Member

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    I was cleaning my carbs too and was wondering . Are those supposed to flow air through cause if that's the case mine are plugged pretty good do you suggest any particular way of cleaning them out because i used the parts washer , got in there with safety wire , used the blow gun and ran em through the ultrasonic parts washer twice and still nothing ....
     
    AlexVF500f, Apr 10, 2012
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  6. Juggernaut1985

    Juggernaut1985 New Member

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    yes i removed the plugs one at a time to check the spark they where firing. so ill take them apart to look at the air passages thanks for the tip i think i got them clean but it dosen't hurt a second look or three
     
    Juggernaut1985, Apr 12, 2012
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  7. tinkerinWstuff

    tinkerinWstuff Administrator Staff Member

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    have you tried taking an eye dropper or something of the sort and pouring an ounce or two of fuel directly down all four carbs and see if it will fire and run for a few seconds?
     
    tinkerinWstuff, Apr 12, 2012
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  8. FoothillRyder

    FoothillRyder New Member

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    When you pulled the plugs, were they wet? Black/fouled? There are clues there lad.
     
    FoothillRyder, Apr 12, 2012
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  9. Juggernaut1985

    Juggernaut1985 New Member

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    Mr. Tinkerinwstuff no but ill try that as well but i did check the pressed in brass tubes and they where cloged and two cans of cab cleaner later they where clean. but when i put the carbs back on the bike would back fire but still no running but that was the most noise i got from it since last winter. Mr. foothillryder they where clean they looked like they where firing. So gods of bikes any other ideas other than the eye dropper to try .
     
    Juggernaut1985, Apr 13, 2012
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  10. xtravbx

    xtravbx New Member

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    try starting it w/ ether?

    also, if its backfiring i'd say the carbs may not be in sync. Did you bench sync them pretty well?
     
    xtravbx, Apr 17, 2012
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  11. squirrelman

    squirrelman Member

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    Beware of ether as excessive use can damage cylinder/rings. Dripping a bit of fuel in as Tink mentioned is fine, but you need to verify that you have sparks at all 4 plugs first, which you did. Next you need to check that the carbs are filling with fuel. Open one carb drain screw and empty it completely. LeAVE THE SCREW OPEN AND crank over on startER or get it running, and fuel drippages should commence if tank, filter, pump, or gravity feed is working right. (( SAFETY FIRST !! Boys, as always, waat-evva u Mick Duhan.))
     
    squirrelman, Apr 19, 2012
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