Question about 1976 BMW R 75-7

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1976 r750/6 The bike loses all electrical power. from 1 - 24 hours later it comes back.

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  • auslabtech May 27, 2011

    Does it lose it while you are riding? After you ride? Does the headlight actually go out and all indicator lights off while you are riding?

  • larsandjudy May 28, 2011

    While riding it goes dead and coasts to a stop. No lights, no horn, no indicators, no warning lights, no electricty at all. It used to only happen when the ambient temp was over 105 F when I lived in Arizona. Now it happened at 65 F and after the last time it only ran for about 5 minutes and has since stayed dead. I have tried swapping batteries to no change. I just changed the voltage regulator with no change.



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Hi, Larsandjudy and the usual suspects are:
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Bank angle sensor tripped and ignition/light key switch not cycled to the "OFF" position and then back to the "ON" position.
5. Security alarm needs a reset.
6. Starter control circuit, relay, or solenoid faulty.
7. Faulty starter button.
8. Electric starter shaft pinion gear is not engaging or over-running starter clutch slipping.
For more information about your issue, please visit the websites below. Good luck and have nice a day.
Thread Bike just loses all electrical power WHILE driving
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Posted on Jan 07, 2016


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