Question about 2003 BMW R 1150 RT (ABS)

1 Answer

2003 1150 rt; fully gassed; left town; climbed up a mountain pass on a two lane; passed a few vehicles; motor konked out; tach to zero and back to 4000rpm a few times until I got stopped; disconnected postive post and shorted the computer to clear and error codes; ran good for 3 hours; did the same thing only faster the second time I fueled up.

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  • phil cuzins
    phil cuzins Oct 15, 2010

    Is the tacho needle fluctuating regardless of your input to the throttle?

  • Karl Adam Oct 15, 2010

    Yes, throttle was held in the same position as it went to 0 and back to about 4000rpm.

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1 Answer

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  • BMW Master
  • 40,013 Answers

Hi, Karl the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or a damaged battery, 9 volts or lower.
2. Faulty alternator/generator and or voltage regulator.
3. 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. Faulty main circuit breaker or ignition switch, check for loose connections and continuity.
5. Faulty system and or ignition relay, check for continuity.
6. Faulty ignition coil, ignition/electronic module.
7. Faulty CKP, CPS, CMP, MAP, TPS, O2, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Water or dirt in the fuel system, carburetor or filter.
9. . Restricted, blocked or kinked fuel line.
10. Fuel tank empty.
11. The gas cap is not venting properly or fuel tank venting system blocked.
12. A faulty Fuel Pump, pressure regulator and or fuel injectors.
13. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
14. Needle and seat stuck closed in the float bowl.
For more information about your issue, please visit the websites below. Good luck and have nice a day.Hints and advice for BMW bike motorcycle owners K1 K75 K100 K1100 bulb...
http://www.k100.biz/pdf/FAQ/FAQ_K100_tips.pdf
http://www.carlsalter.com/download.asp?p=313
BMW Motorcycle Parts Fiche OEM BMW Motorcycle Parts online 1970 present BMW
http://www.bmw-motorrad.com/us/en/index.html?content=http://www.bmw-motorrad.com/us/en/services/manuals/manuals_main.html¬rack=1

Posted on Dec 22, 2015

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Posted on Jan 02, 2017

  • 17 Answers

SOURCE: 84 k100rs runs poorly hard to start at times no

Problem could be throttle sensor situated on left side of bike below fuel tank, your symptons appear similar to mine of past. Cured mine by fitting new sensor.

Posted on Jul 30, 2010

kirkx
  • 2019 Answers

SOURCE: Subject: 1985 K100 RT. Has

Plugged fuel filter is most likely.
The tank did not get a puncture, but rusted through.
That means it is full of rusty water.
Take the tank back off, flush it, consider having it coated, replace the fuel filter, and see what happens.
You could then put a fuel pressure gauge on it to see if the pump is going bad. The fact it idles implies the electronics are ok, just restricted gas flow probably.

Posted on Jul 26, 2011

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