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Thread: Bike cuts out under load?

  1. #61
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    17th November 2011 - 21:48
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    Yamaha Virago xv 250
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    reading on the internet "Alright so my mechanic checked my bike out and he found that one of the lines to the fuel tank was plugged. He unplugged it but a new line on. He also mentioned a fuel valve or something that recycles unused fuel back into the engine was gone or not functioning right. He said when he was checking it out the fuel was coming out slowly and then barely at all. (not sure where this was happening but he started mentioning things about how the carbs didnt have enough fuel in them and what not. Anyway he told me to ride it around for a week and see if I still have issues with it. So far it run's A LOT better. To me it's almost like a new bike. Runs smoother, sounds better, and maxes out at around 106mph, previously it was around 90.

    Sorry this description sucks but hopefully it gives you an idea of what was wrong."


    I found a tube that was wet on one end and that hangs down the bottom of my bike just chilling not connected to anything under the seat.

  2. #62
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    20th June 2011 - 20:27
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    Dog Rooter, 1290 SDR
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    Get some clear plastic hose, under the carb there should be a drain and a screw to undo it. Put the hose on the pipe and hold the pipe up. Undo the drain screw. Fuel will flow into it to the height of where it sits in the carb. If it goes above float bowl height thats your issue. Sounds like your float valve is rooted or blocked in the carb.
    Quote Originally Posted by Katman View Post
    but once again you proved me wrong.
    Quote Originally Posted by cassina View Post
    I was hit by one such driver while remaining in the view of their mirror.

  3. #63
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    17th November 2011 - 21:48
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    Quote Originally Posted by nzspokes View Post
    Get some clear plastic hose, under the carb there should be a drain and a screw to undo it. Put the hose on the pipe and hold the pipe up. Undo the drain screw. Fuel will flow into it to the height of where it sits in the carb. If it goes above float bowl height thats your issue. Sounds like your float valve is rooted or blocked in the carb.
    thanks, i'll do that when i get home. what gives you that impression?

  4. #64
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    20th June 2011 - 20:27
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    Quote Originally Posted by Lus7 View Post
    thanks, i'll do that when i get home. what gives you that impression?
    Sounds like she is over rich, and thats the most likely cause.
    Quote Originally Posted by Katman View Post
    but once again you proved me wrong.
    Quote Originally Posted by cassina View Post
    I was hit by one such driver while remaining in the view of their mirror.

  5. #65
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    17th November 2011 - 21:48
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    Yamaha Virago xv 250
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    It also sounded like it was reving pretty hard on the highway, even though it's only got 5 gears it sounded way over the top
    reakon drilling holes in my exhaust is making my bike run rich? doesn't it usually make it run lean?

  6. #66
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    9th October 2008 - 15:52
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    Sounds like the vacuum hose onto the fuel tap was this issue.If the mechanic has fixed it then stop playing with the bike before you break something.
    I have evolved as a KB member.Now nothing I say should be taken seriously.

  7. #67
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    17th November 2011 - 21:48
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    Quote Originally Posted by mossy1200 View Post
    Sounds like the vacuum hose onto the fuel tap was this issue.If the mechanic has fixed it then stop playing with the bike before you break something.
    Never took it to a mechanic, just changed the spark plugs and it seemed to fix it.
    May end up taking it to a mechanic if I have to, but I'd be rather keen to learn to fix it myself

  8. #68
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    17th July 2005 - 22:28
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    Dougcati, Geoff and Suzi
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    First things first.
    Replace the small vacuum line between the fuel tap/intake.

    If that doesn't work:
    Pull the spark plugs out and check them against this:
    http://www.angelfire.com/fl4/pontiac...Readplugs.html
    Then:
    Do what NZspokes has said.
    Then: if the float level is higher than your owners manual (assuming you have one, if not, get one) specifies, adjust it.
    Clean the carbs while you're there.
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
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  9. #69
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    17th November 2011 - 21:48
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    So i'm trying stuff out, I just noticed I hadn't put the battery in properly at all. It was sitting loosely on top of it's strap and the battery breather hose wasn't connected.

    Would that do anything?

    Also, I pulled out the spark plug and it's pretty black so my bike seems to be running real lean. i'm gonna try that clear hose thing, as soon as I figure out which hose to pull.

    And What hose is on the fuel tap

  10. #70
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    17th July 2005 - 22:28
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    Quote Originally Posted by Lus7 View Post
    So i'm trying stuff out, I just noticed I hadn't put the battery in properly at all. It was sitting loosely on top of it's strap and the battery breather hose wasn't connected.

    Would that do anything?
    I doubt it

    Quote Originally Posted by Lus7 View Post
    Also, I pulled out the spark plug and it's pretty black so my bike seems to be running real lean. i'm gonna try that clear hose thing, as soon as I figure out which hose to pull.
    Black = rich.

    Quote Originally Posted by Lus7 View Post
    And What hose is on the fuel tap
    There will be two hoses, one fat one (fuel) and one small one (vacuum) replace the small one, if the other is soft or perished looking, replace it too
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  11. #71
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    17th November 2011 - 21:48
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    Quote Originally Posted by nzspokes View Post
    Get some clear plastic hose, under the carb there should be a drain and a screw to undo it. Put the hose on the pipe and hold the pipe up. Undo the drain screw. Fuel will flow into it to the height of where it sits in the carb. If it goes above float bowl height thats your issue. Sounds like your float valve is rooted or blocked in the carb.
    lol arm covered in gas

  12. #72
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    17th November 2011 - 21:48
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    Quote Originally Posted by ducatilover View Post
    Black = rich
    right, because soot = not enough oxygen in burn

    http://i.imgur.com/uAfcn.jpg <- spark plug
    http://i.imgur.com/NpxtL.jpg <- clear hose coming out of the carb. does this mean anything?

    (sorry about the insane fisheye. These were taken on a GoPro

  13. #73
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    17th July 2005 - 22:28
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    My eyes aren't good enough for them pics sorry
    I can see that the plug is rich looking, but the plug temp is okay.

    Will have to wait 'till someone else looks at the first pic
    Quote Originally Posted by Paul in NZ View Post
    Ha...Thats true but life is full horrible choices sometimes Merv. Then sometimes just plain stuff happens... and then some more stuff happens.....




    Alloy, stainless and Ti polishing.
    Bling your bike out!
    PM me

  14. #74
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    17th November 2011 - 21:48
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    http://i.imgur.com/N0xYH.jpg <-- better picture

  15. #75
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    17th November 2011 - 21:48
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    http://i.imgur.com/eta8u.jpg

    that's the fuel tap right? which one is the vacume line?

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