Author Suddenly won't start  (Read 8375 times)

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  • Offline Cazzy_R   england

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      #20

    Offline Cazzy_R

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    Re: Suddenly won't start
    Reply #20 on: Jan 04, 2023, 05.09 am
    Jan 04, 2023, 05.09 am
     Sounds like a bad battery to me.

  • Offline zed9   us

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      #21

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    Re: Suddenly won't start
    Reply #21 on: Jan 04, 2023, 03.55 pm
    Jan 04, 2023, 03.55 pm
    *Originally Posted by Cazzy_R [+]
    Sounds like a bad battery to me.
    +1
    I have a friend thatís a pro motorcycle mechanic of over thirty years. He told me 95% of electrical problems with a bike are related to bad batteries and/or bad battery connections.

  • Offline Smoky   us

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    • #22

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    Re: Suddenly won't start
    Reply #22 on: Jan 04, 2023, 05.46 pm
    Jan 04, 2023, 05.46 pm
    Even though I'm sure that's not the case, I've got white spark on the plugs.  Not bluish. Voltmeter and dash show battery 12.5 at rest. I will try another battery this evening and post up results.

  • Offline Smoky   us

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    • #23

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    Re: Suddenly won't start
    Reply #23 on: Jan 04, 2023, 11.14 pm
    Jan 04, 2023, 11.14 pm
    Battery connections are clean and tight. 2 different volt/ohm meters 12.6 and 12.7 dash indicates 12.7 as well. Pulled the plugs again and they are now wet from priming fuel down the throttle bodies but getting spark. Could it have jumped timing to the cams?

  • Offline zed9   us

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    Re: Suddenly won't start
    Reply #24 on: Jan 05, 2023, 12.11 am
    Jan 05, 2023, 12.11 am
    *Originally Posted by Smoky [+]
    Battery connections are clean and tight. 2 different volt/ohm meters 12.6 and 12.7 dash indicates 12.7 as well. Pulled the plugs again and they are now wet from priming fuel down the throttle bodies but getting spark. Could it have jumped timing to the cams?
    Keep the volt meter on the battery while cranking. What does it drop to?
    A healthy battery should see 11 volts or so. A weak battery will drop to 10 volts and lower.

  • Offline Smoky   us

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    Re: Suddenly won't start
    Reply #25 on: Jan 05, 2023, 11.58 am
    Jan 05, 2023, 11.58 am
    Battery voltage during cranking drops to 11.1 to 11.3

  • Offline Cazzy_R   england

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    Offline Cazzy_R

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    Re: Suddenly won't start
    Reply #26 on: Jan 05, 2023, 03.17 pm
    Jan 05, 2023, 03.17 pm
    *Originally Posted by Smoky [+]
    Could it have jumped timing to the cams?

    I'd expect it to run poorly, rather than not at all if it was cam timing. Did you have any cam chain rattles before this occurred?
    Is the fuel fresh? Had you recently filled up prior to this problem?
    I still think it'd be wise to try a known/new battery.
    Last Edit: Jan 05, 2023, 03.24 pm by Cazzy_R

  • Offline zed9   us

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    Re: Suddenly won't start
    Reply #27 on: Jan 05, 2023, 05.12 pm
    Jan 05, 2023, 05.12 pm
    Is there a procedure in the manual to test the throttle position sensor?

  • Offline Smoky   us

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    Re: Suddenly won't start
    Reply #28 on: Jan 05, 2023, 06.31 pm
    Jan 05, 2023, 06.31 pm
    Will have to check manual for throttle position sensor. Fuel not fresh but not old by any means.  No cam chain rattles. Tensioner retracts and extends as it should.

  • Offline zed9   us

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    Re: Suddenly won't start
    Reply #29 on: Jan 05, 2023, 10.51 pm
    Jan 05, 2023, 10.51 pm
    I found this in the repair manual. It is a screenshot off my old iPad. I donít know how to transfer it to my new iPad.
    But here it is.


     



    rockbound