BMW K bikes (Bricks)

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Bonzo

Bonzo
Life time member
Life time member
Good morning all,

After letting my previous battery die with a drain somewhere, I tried swapping out the regulator/rectifier - as this is what most people reckoned the drain was. I purchased a new battery - a Motobatt MBTX30U and we have lift off again Smile

..but (there's always a but), my abs lights are flashing and don't respond to a reset.

Could it be that the flashing abs indicates that there is still a drain somewhere?

As per the title my new (fully charged) battery reads 14.02v while running & doesn't change much when revved. Is 14.02 right??

Cheers

Bonz


EDIT: I didn't mention, its a 1990 16v.



Last edited by Bonzo on Mon Oct 05, 2015 5:54 am; edited 1 time in total (Reason for editing : addition)

    

RicK G

RicK G
admin
admin
I have found that the ABS unit will drain the battery if it is faulty. What you describe is exactly the circumstances I have seen before.
My wife's K75 was draining the battery and as soon as Tosi fixed it all was good and I have seen it with one other and heard of it on several more occasions.
I would expect 14.2 at 3000rpm and slightly less than 14 at Idle but what you are seeing is quite OK


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

Bonzo

Bonzo
Life time member
Life time member
Thanks very much Rick

All the best from a damp & windy IoM  Smile

    

Holister

Holister
Life time member
Life time member
I honestly think that the Motobatt MBTX30U is the perfect battery for the K100 2V or 4V. Plenty of power, maintenance free and will maintain its charge for weeks when not in use.
For Ozzie K-bikers the best place to buy one is from batterybusiness.com   Excellent next day delivery from Clive and I could not find cheaper at AU$190 delivered.

Re ABS... try this link
https://www.k100-forum.com/t7117-abs-a-flashing-question

Measuring the voltage at idle doesn't mean anything.
Static (engine not running) around 12.8V or more is best
Charging (at 2-3k rpm) 13.8 to 14.4V max


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  New battery showing 14.02v at idle. Is this ok? Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

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