Question about 2008 BMW F 800 ST

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VERY New F800ST won't start

New '08 F800ST less than 1000miles on it suddenly won't start. Sat unused in Garage for about 3 weeks. Went to start it and get clicking sound from underneath front left fairing. On-Board Computer and Dials (Speed and Tech) seem to reset themselves immediately after attempting to start.

Pulled battery and connected to Cheap $20 Wal-Mart Battery Charger which reported the battery was good with full charge. Reconnected Battery, bike still won't start. OBC and Dials light up, then push start button, clicking sounds start, release button OBC and Dials reset themselves.

Any thoughts?

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  • Nikos Kakalos
    Nikos Kakalos May 23, 2012

    This is clearly a battery problem. Sometimes the batteries lose their power (Amperes) but the voltage is fairly good so the chargers (wich measure the voltage) report that the battery is good. So when you try to crank the motor, the starter consumes all the power (amperes) wich offcourse is not enough. This means light and the dashboard run out of power and reset themselves and the only thing you hear is the click from the starter switch. Borrow a good battery and try again. If the bikes starts then the problem is the battery or the charging circuit. After starting the bike with a good battery, measure the voltage on the poles of the battery with a multimeter. You should get a reading of ~13,5 V or so. If you get under a reading in the 12's and under your bike is not charging the bat properly, and over 14V then your bike is overcharging. Bot cases need to be fixed, or the bike will keep destroying any battery attached


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Hi Stephen,

A year later, but I have exactly the same problem with my 2008 ST. Could you find a solution to this problem?

Posted on Jan 19, 2011

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May be because charge on bike's battery went down.
you may have to charge it.

Posted on Jan 22, 2009

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