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Thread: Suzuki SJ50QT strange issues...any ideas?

  1. #1
    Join Date
    11th March 2008 - 19:14
    Bike
    Suzuki TF125-
    Location
    Taranaki
    Posts
    5

    Suzuki SJ50QT strange issues...any ideas?

    Hi all, so I have been fighting a losing battle with my suzi for a few months now. As a foreword, I am relatively familiar with 2 strokes, and passably mechanically adept.

    The little B***h will sit on the stand and idle all day if I let it, but as soon as it's given some herbs it will act like it's starving for fuel, it dies completely but will go back to idling if I let my hand off the throttle.

    So far, I have:

    -Pulled carb off, cleaned and blown all jets and passages clear, and checked float height which looks kosher.

    -Installed new NGK spark plug

    -Filled up with fresh gas

    -Replaced inline fuel filter

    -Cleaned stock exhaust, which appears to be nicely free flowing.

    -Sprayed CRC around carb manifold gasket, no change to engine speed.

    -Checked variator assembly just in case something funny was going on there, all clear.

    -Checked fuel flow to carb, fine.

    -Checked compression, feels fine.

    I am fast running out of ideas on what else it could be, it isn't acting like any crank seal issue I have ever encountered, as it will sit and idle fine. It might rev out on the stand for <5 seconds if I'm lucky, until it dies again. Do you folk have any ideas?

  2. #2
    Join Date
    25th January 2017 - 15:25
    Bike
    ajs 350 trials
    Location
    whitecliffs
    Posts
    39
    have you checked fuel flow from the tank? coil breaking down under load? air flow? the filter may be collapsing .
    riding history into the future since ages ago.

  3. #3
    Join Date
    11th March 2008 - 19:14
    Bike
    Suzuki TF125-
    Location
    Taranaki
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    5
    Quote Originally Posted by robajs View Post
    have you checked fuel flow from the tank? coil breaking down under load? air flow? the filter may be collapsing .
    Yup, forgot to mention the air filter has been replaced recently, cleaned it once problems started happening to no avail. And fuel flow from tank is fine.

  4. #4
    Join Date
    5th April 2004 - 20:04
    Bike
    Exxon Valdez
    Location
    wellington
    Posts
    13,130
    Safety switch.
    Polemic....look it up

  5. #5
    Join Date
    11th March 2008 - 19:14
    Bike
    Suzuki TF125-
    Location
    Taranaki
    Posts
    5
    Quote Originally Posted by Drew View Post
    Safety switch.
    Is there any chance you could please elaborate on that?

  6. #6
    Join Date
    5th April 2004 - 20:04
    Bike
    Exxon Valdez
    Location
    wellington
    Posts
    13,130
    Some scooters have a safety switch on the stand, so the bike wont rev with the stand down.
    Polemic....look it up

  7. #7
    Join Date
    11th March 2008 - 19:14
    Bike
    Suzuki TF125-
    Location
    Taranaki
    Posts
    5
    Quote Originally Posted by Drew View Post
    Some scooters have a safety switch on the stand, so the bike wont rev with the stand down.
    Good point thanks, but not the case with my one sorry.

  8. #8
    Join Date
    4th May 2017 - 10:23
    Bike
    Old Bikes
    Location
    Both sides of the Tasman
    Posts
    72
    Head gasket? Try the spray trick around the barrel. Nothing too flammable.

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