1970 Suzuki T250 won't start
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1970 Suzuki T250 won't start

This is a discussion on 1970 Suzuki T250 won't start within the Technical forums, part of the Caferacer.net Forums category; My T250 quit running on me last August. I parked it until now and I'm having problems getting it going. I bought new spark plugs, ...

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  1. #1
    Senior Member muskies666's Avatar
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    1970 Suzuki T250 won't start

    My T250 quit running on me last August. I parked it until now and I'm having problems getting it going. I bought new spark plugs, new air filter, rebuilt the carbs and adjusted the points to the manuals specs. I am running the stock filter, carbs and exhaust. I drained the old fuel and put fresh fuel in. The compression measures 115psi on the left and just over 120psi on the right. It is supposed to be 140psi. I have great spark and am getting fuel to the chamber but I'm not getting anything. No pops or even a sign of it wanting to fire. The plugs looked a bit oily and when I checked the oil pump I noticed the lever was stuck open:

    What it looks like closed:

    That would explain my super smoke out episodes when it was running, but now that I fixed it im still not getting anything. Is the compression just too low to fire? surely I would get something. Any ideas for me?
    Thanks.
    (sorry for the lengthy story)
    oh and the bike:

  2. #2
    Senior Member Teazer's Avatar
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    That should be enough compression, though it is rather low.

    When you say it quit on you last August, what happened and how was it running before that?

    Did you check the ignition timing? IS it possible that the points cam came loose and rotated slightly?

    Put new plugs in

  3. #3
    Senior Member Teazer's Avatar
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    That should be enough compression, though it is rather low.

    When you say it quit on you last August, what happened and how was it running before that?

    Did you check the ignition timing? IS it possible that the points cam came loose and rotated slightly?

    Put new plugs in

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  5. #4
    Senior Member muskies666's Avatar
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    It was running fine, rode it to work and parked it. When I came out it wouldn't start. Couldn't get gas into the bowls. It hits 100deg here in the summer all the time so I usually have to prime the bowls to start it. I just put brand new plugs in, and I have done the timing, even played with rotating the points in both directions.

  6. #5
    Senior Member muskies666's Avatar
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    It was running fine, rode it to work and parked it. When I came out it wouldn't start. Couldn't get gas into the bowls. It hits 100deg here in the summer all the time so I usually have to prime the bowls to start it. I just put brand new plugs in, and I have done the timing, even played with rotating the points in both directions.

  7. #6
    Senior Member Teazer's Avatar
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    Are the bowls filling with gas OK now?

    Did you check the timing with a light (a bulb and leads, not a timing light) or buzzer to confirm that it really is firing at more or less the correct time?

    Does that motor have crankcase drains? If so I'd open them just to be sure the crankcase isn't full of oil or stale gas.

  8. #7
    Senior Member Teazer's Avatar
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    Are the bowls filling with gas OK now?

    Did you check the timing with a light (a bulb and leads, not a timing light) or buzzer to confirm that it really is firing at more or less the correct time?

    Does that motor have crankcase drains? If so I'd open them just to be sure the crankcase isn't full of oil or stale gas.

  9. #8
    Senior Member spacmanspif300's Avatar
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    If it doesn't have a drain, could you tap one without serious problems? Assuming that you had it apart and could thus remove all the shiny bits.

  10. #9
    Senior Member spacmanspif300's Avatar
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    If it doesn't have a drain, could you tap one without serious problems? Assuming that you had it apart and could thus remove all the shiny bits.

  11. #10
    Senior Member Geeto67's Avatar
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    sounds like you are not getting any spark.
    Ever tried. Ever failed. No matter. Try Again. Fail again. Fail better.
    - Samuel Beckett
    A tool is just an opportunity with a handle
    - Kevin Kelly

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