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Thread: Bump start

  1. #1
    Standard Member powders's Avatar
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    Bump start

    Hi all
    Had to make a stop off on way to work this morning and when I tried to re start my bike it wouldn't start
    Tried to bump start it myself - no joy
    Got two big polish fellas to push me also - nothing
    I've always managed to start all my bikes by bump starting them but that's twice now in the last year I haven't been able to with the bmw
    Had to call out a recovery van who jumped started it.
    While I was waiting for them I phoned around bike shops to see if they had a battery in stock. Phoned my local bmw shop and they quoted me €165
    Drove to another independent and they had one for €85
    Anyway the question is can you bump start them ?

  2. #2
    Forum Admin soofsayer's Avatar
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    Re: Bump start

    I think the problem with bmws is the canbus. If the bike can't see enough voltage it won't prime the fuel pump or any of the electrics so effectively nothing is going to happen. Someone more technical may be able to elaborate.

    When you say it wouldn't start, did it turn over at all or do nothing when you pressed the starter button, did the dash go off/on etc?

  3. #3
    Standard Member flurbs's Avatar
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    Re: Bump start

    Can Tim at Lind help with this question?

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    LIFETIME FORUM MEMBER JimmyMac's Avatar
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    Re: Bump start

    I've bump started mine Powders. The battery wasn't 100% flat but didn't have enough charge to turn the starter. Luckily I live on quite a steep hill and rolled up to a fair speed before dumping the clutch. Got it going second try.

    Hope you get to the bottom of your problem, twice in a year is a bummer.

    JimmyMac

  6. #5
    Standard Member powders's Avatar
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    Re: Bump start

    The battery was the original bmw one and the bikes an '11 so it was definitely time for a new one
    Turned key on all dash lights etc came on and headlight but don't think I heard the fuel pump
    Hit the starter and all the lights faded and didn't sound like it was going to start
    It was 1 degree when I was leaving this morning so the heated grips were on and the recovery man said with the cold snap lately he's been flat out with dead batteries
    It started straight away with his jump starter so I went straight to my local bike shop and got a new one.
    Have started it probably 4-5 times since and it jumps into life
    Jimmy, your a better man than me starting it on your own
    I was wrecked and the two polish lads looked like they were going to have a cardiac

  7. #6
    1 YEAR PREMIER MEMBER bananaman's Avatar
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    Re: Bump start

    I've had the dreaded loose terminal situation which gives the same impression
    Speed doesnt kill, its how fast you stop.......

  8. #7
    Forum Vendor Tim @ Lind's Avatar
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    Re: Bump start

    Hi powders,

    What has been suggested is correct as far as we are aware. If the voltage is below a certain amount (unable to find out specifically at the mo) the can bus will not allow it to power the fuel pump.
    The draw to turn on the combi unit (dash) is so minimal that it will normally illuminate. If it ever doesn't turn the dash on, we would then be looking at terminals or be checking the big 30a fuse.
    As you mentioned a 2011 battery would be due a change, we suggest a three to five year life span, but it does all come down to usage and whether it is kept on a conditioner etc etc.


    Best regards,

    Tim.
    Owner of a fairly well known 2015 S1000RR
    www.lindmotorrad.co.uk

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  10. #8
    LIFETIME FORUM MEMBER JimmyMac's Avatar
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    Re: Bump start

    I'm no Superman Powders, it is a very steep hill I stay on, you can probs be doing 40-50 by the time your at the bottom, freewheeling. If it never started you'd need a tow back to the house.

    Is the bike ok now?

    JimmyMac

  11. #9
    Standard Member powders's Avatar
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    Re: Bump start

    Thanks lads for the feedback
    Yeah Jimmy bought a new battery and so far so good

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  13. #10
    Forum Moderator alex's Avatar
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    Re: Bump start

    Whilst having the electrical glitch...it bump started at 80 just fine...problem was I was doing 60 by the time I'd finished...on a mway...


    - Sent from Mobile

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