Backfire

Discussion in 'Mechanics Garage' started by SimonBurrows, Feb 5, 2019.

  1. SimonBurrows

    SimonBurrows New Member

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    Hi
    It nearly starts, then a very loud backfire. Does this indicate a timing problem?

    Many thanks

    Simon
     
  2. squirrelman

    squirrelman Member

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    unlikely on a VFR unless cams were removed recently for valve clearance adjustment.
     
  3. Thumbs

    Thumbs Member

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    Fuel starvation unless you’ve pulled the engine down
     
  4. squirrelman

    squirrelman Member

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    your starting fuel enrichment device (choke) system could be clogged. drain the float bowls and try again. and how long since your last ride ??
     
    Last edited: Feb 9, 2019
  5. OZ VFR

    OZ VFR Member

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    You don’t mention model, history or anything.
    We can only guess without more information.
     
  6. SimonBurrows

    SimonBurrows New Member

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    Thank you for the replies
    5th generation 1998. Things are getting worse, I have no fuel pump sound now when I switch the ignition on. I’ve checked the fuses around the battery area and all ok. Is there any other fuses anywhere?
     
  7. SimonBurrows

    SimonBurrows New Member

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    It has been stood for almost a year
     
  8. FJ12rydertoo

    FJ12rydertoo Member

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    With no fuel pump noise, that is the first place I would start. Doesn't matter what else works, but
    if the fuel pump no worky, then bike no runny. Get out the ol' multi-meter and check voltage at the
    pump.
     
  9. squirrelman

    squirrelman Member

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    you'll need to drain and flush petrol tank then fill with fresh fuel.
     
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