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Idling different on stand then when upright

Discussion in 'Suzuki 250cc In-line 4's' started by Ryan1993, Feb 13, 2016.

  1. Ryan1993

    Ryan1993 Member

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    So purchased GSX250F for a project bike, removed the bowls off the carbys and soaked the carbys in fuel and air compressed the jets out. Did not remove the slides and needles cause we found the choke cable jammed. But the problem we are having is, we got the bike idling nice whilst on the side stand but once you sit on the bike and put the bike upright, it increases its revs a fair bit. We have tried what we think it could be but not sure. Does the carby need a proper clear, pull it right apart or is it an electrical issue? The air box is still off, would that be a factor?
     
  2. Joker

    Joker If you want me find Club250 on facebook. Premium Member Contributing Member

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    Firing compressed air down the jets will not necessarily completely clear them. I use a piece of wire brush or a piece of toothbrush to gently rub them out.

    in terms of the idling issue I'd suggest fuel is a factor, probably float seal related. It could also be pilot screw related - did you check the pilot holes and clear them out as well?
     
  3. Linkin

    Linkin The Apprentice Premium Member Dirty Wheel Club Contributing Member

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    You need to sync the mixture screws on each carb. Refer to the service manual for the standard setting
     
  4. Ryan1993

    Ryan1993 Member

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    Float seals you couldnt really check tho, would just be best to get a carby kit and replace them.

    1 1/2 from seated is standard for the GSX250 as far as i have read.
     
  5. sarahb

    sarahb Well-Known Member

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    Sounds suspiciously like a similar thing mine was doing. Turned the bike inside out before realising it was something more simple: the throttle cable. There are several or more places where it can get jammed and stuck. First one is inside the hand grip itself. Another is between the boot and top of the carbs. Check it out from one end to the other. See if it's moving freely all the way along with the boot in place and the handle bars in all positions etc


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  6. Pygmygod

    Pygmygod Well-Known Member

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    I'd also clean your jets out in carb cleaner as fuel won't be as effective.
    Just make sure to remove them from the carbs before cleaning as the carb cleaner also damages rubber/plastic (ie. the carb diaphragms may get damaged)

    There's a stickied thread in the Across section which shows you where you can buy replacement jets at a really cheap price from some guy in Queensland I think they are.
     
  7. Ryan1993

    Ryan1993 Member

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    The revs increase when the bike is put upright regardless of where the bars are so I think it will be time to do a carby clean.

    [​IMG]

    Also, as pictured in the red circle, these plugs get quiet warm. Not to the point of burning yourself but at the moment the bike as no seat on it and when you sit on it, your leg gets quite warm/hot from them. Believe they go down to the starter motor, is this normal or what?
     
  8. Simon

    Simon Well-Known Member Premium Member Contributing Member

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    Normal, same connections as a gsxr 250 73a..three unequal length wires, trace them to the LHS engine casing, attach to the main wiring loom. Will get warm in use as supply voltage/current from the stator. Had a similar problem a while back but slightly different. May or may not be related..bike ran perfect on the sidestand then had an intermittent fuel/electrical issue when the stand was up and I was on the bike..traced (by luck lol) to the wiring loom..side stand switch was fine but loom conection to it was intermittent..those plugs heated up lots though i'm unsure why as when you look at the electrical diagrams there not related..hope this might help, cheers, si
     
  9. Lynxdragon

    Lynxdragon Well-Known Member

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    If those wires are 3 yellows, they are most likely from the stator. So they will get warm, however just check the wire for damage and the connections because if that fails your bike will stop charging.


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