Suzuki JR50 Oil Pump and Clutch questions.

Discussion in 'Motorbike Technical Discussion' started by jhermann, Jul 11, 2008.

  1. jhermann

    jhermann Guest


    I don't have a manual for this bike yet, so these questions may be
    I have a 1980 JR50 that I'm trying to get running for my kids.

    First Problem: If kick starting hard, the clutch slips thus the crank
    does not turn.
    I have adjusted the clutch by turning the adjustment under the small
    clutch cover
    until it starts to resist, then backed off by 1/4 turn; read this
    procedure on the internet.

    Second Problem: The cylinder fills up with oil from the oil pump
    PDQ. Is there
    an adjustment for this, or are the parts that need to be replaced to
    fix this.
    I can mix the gas, but would prefer not to. Also, there is a small
    screw on
    top of the clutch side cover that has a rubber seal; is this an
    adjustment for
    the oil pump flow rate? This screw is currently completely screwed in
    and tight.

    A manual sure would help me; is there a PDF of one on line anywhere?

    Thanks for any help.
    jhermann, Jul 11, 2008
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  2. jhermann

    jhermann Guest

    I'm following up to my own post to report what I found out about my
    oil injection problems with a Suzuki JR50.
    The check valve located in the clutch cover housing turned out to be
    bad. Replacing it solved the cylinder filling
    up with oil problem.

    I have another question...

    Does anybody know if a clutch cover for an ALT50 would fit on a JR50?
    I know the engines are not the same
    and have different crankcases; but they look very similar.
    jhermann, Aug 5, 2008
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  3. jhermann

    mike081999 Guest

    Hey I dont know if you still need help on this but i have a manual pdf you can have a copy of , as for the clutch cover alt 50 motors are jr50 motors just slight changes it depends on the year I have a 82 suzuki the last of the phase 1 bikes which is giving me troubles in starting. I dont have much experiance in jrs' but i may be able to help and you may be able to help me..
    mike081999, Mar 12, 2015
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