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Grinding when starting

Discussion in 'XJ Technical Chat' started by Kacen, Aug 15, 2017.

  1. Kacen

    Kacen New Member

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    So I just got my 1981 seca 750 and it's been running great. New oil rebuild carbs and cleaned her up. But a few days ago she started grinding upon trying to start it. It won't start every time and when it doesn't it just sounds like the starter is free spinning. Is this just the starter or something else??
     
    Kacen, Aug 15, 2017
    #1
  2. Stumplifter

    Stumplifter Well-Known Member

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    Coffee can with gravel in it sound?
    Do the easy stuff first, check you battery voltage at rest, then whilst cranking. Post back what you have.
    Strongly consider going through the wiring on your 36 year old bike and make sure connections are clean and solid, bring some die-electric grease on that journey and pay special attention to grounds.
     
    Stumplifter, Aug 15, 2017
    #2
  3. mlew

    mlew Well-Known Member

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    What kind of oil did you use? Synthetic oils can sometimes cause starter clutch problems.
    Might also be time for a starter rebuild. Chacal has a nice kit with ALL the parts you need.
     
    mlew, Aug 15, 2017
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    Rooster53, k-moe and Stumplifter like this.
  4. Kacen

    Kacen New Member

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    I actually was able to check the voltage last night and there was barley any voltage. while cranking and it does sound like coffee can with gravel. I'm gonna go threw and check the grounds like you suggested and replace battery.
     
    Kacen, Aug 15, 2017
    #4
  5. XJ550H

    XJ550H Well-Known Member Premium Member

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    bad battery/needs charge or starter clutch
    sounds like low voltage what voltage did you get?
    you should be reading directly off of battery for first test of voltage drop
    the starters will spin with very low voltage
     
    XJ550H, Aug 15, 2017
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  6. Jetfixer

    Jetfixer Well-Known Member

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    My Seca 750 does this when hot , it is starter clutch slipping ... at some point I will pull engine and split the case and replace . Agree if you have synthetic oil this can cause starter clutch to slip . Mine does not do this every time one thing I did was switch from 10w40 to 20w50 oil (motorcycle oil) this has helped
     
    Jetfixer, Aug 15, 2017
    #6

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