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Starter not disengaging?

Discussion in 'The Garage' started by bosco659, Oct 11, 2020.

  1. bosco659

    bosco659 XS650 Addict XS650.com Supporter

    When I first got my ‘76 it had starter issues. I replaced the gear, squeezed the spring clip in a vise and now it’s engages 100% of the time. Thanks for the tip on fixing this. This was one of two issues. The second issue is once the engine starts and the starter button is released, it sounds like the starter gear (S) remains engaged for a couple of seconds. I’m thinking either the gear is “stuck” in place momentarily or the starter motor continues to remain engaged for a couple of seconds.
    I’m away from the bike right now but when I get back to it I’ll try probing around with a test light to see if I can find an electrical gremlin that’s hanging up in the starter circuit.
    Any intel on this would be appreciated. Perhaps I can post a video of the noise. I’ll try that as well when I get back.
     
  2. gggGary

    gggGary I'm listening, change my mind XS650.com Supporter Top Contributor

    Do you still have the starter "safety relay"?
    One of it's lesser understood functions is disengaging the starter as soon as the motor "catches" I've tried both ways, My, your thumb cannot be as quick as the circuit in releasing power to the starter. It seems that if the starter gear train gets spun up with the motor, the bendix is much more likely to hang causing that run on. On my bikes the relay stays in place.
     
    bosco659 likes this.
  3. bosco659

    bosco659 XS650 Addict XS650.com Supporter

    The relay is physically there but I’m not sure if it’s working properly. If it is pooched would the starter not work at all? Test procedure for tge relay? Thx
     
  4. gggGary

    gggGary I'm listening, change my mind XS650.com Supporter Top Contributor

    I think it does not DISCONNECT if pooched. It uses the yellow wire from the alternator to open the starter circuit via a m/l 6 volt AC relay.
    Guess the quick test would be hitting the starter button with the motor running in neutral. I'd try it, others mebbie not....
     
  5. bosco659

    bosco659 XS650 Addict XS650.com Supporter

    Thanks I’ll investigate when I get back. Maybe if I start it and while running, disconnect the wire from the solenoid to the starter then put a meter or test light on the empty solenoid terminal and hit the starter button?
     
    gggGary likes this.
  6. 5twins

    5twins XS650 Guru Top Contributor

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    It might be easier to test the R/W wire coming out of the safety relay and running to the solenoid. With the key on, motor not running, it should be sending power to the solenoid. Once the motor is running, it should stop.
     
    timbeck and gggGary like this.
  7. bosco659

    bosco659 XS650 Addict XS650.com Supporter

    Ok sounds good. Easy way is a good thing. I’ll check it out when I get back. Thx.
     
  8. XSLeo

    XSLeo XS650 Guru Top Contributor

    On gthe bendix there are two springs. The wish bone spring holds the gears so it moves on the line to engage the gears. There is a return spring. It pushes on the gears to disengage them.
    If this spring is weak it won't disengage the gears as quickly as they should.
    On my 75 I stretched this spring a bit to give it more push. The gears disengage better . If the temperature is very cool to cold the thicker the oil. This thicker oil tends to hold thing in place. This can also cause what you are hearing.
    Doing the electrical checks won't hurt. It's easier to do them than pulling the cover off to tension the return spring.Leo
     
  9. 5twins

    5twins XS650 Guru Top Contributor

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    I don't think it's that little return spring. I don't have one installed at all on my '78 and it doesn't stick engaged. Pamcopete recommended removing it for better engagement but honestly, I don't notice any difference. I'll probably put it back in someday.
     
  10. bosco659

    bosco659 XS650 Addict XS650.com Supporter

    Thx I’ll do the electrical checks first. Too bad I didn’t think about the return spring when I had it apart. The noise is the same with a hot and cold engine.
     

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