Question about BMW Motorcycles
Posted by Anonymous on
Hi, Anonymous the following applies to carbureted also fuel injected models and the usual suspects are:
1. Severely discharged or damaged battery, 9 volts or lower.
2. Failed alternator/generator and or voltage regulator.
3. Loose or corroded battery terminals and or cables especially the "NEGATIVE" cable, look for loose, corroded, or broken connectors inside the cable harness at "BOTH" ends.
4. Failed main circuit breaker or ignition switch, check for loose connections and continuity.
5. Failed system and or ignition relay, check for continuity.
6. Failed ignition coil, ignition/electronic module.
7. Failed CKP, CPS, CMP, MAP, TPS, or BAS sensor, corroded, loose or broken wire connector pins/sockets.
8. Throttle cables and or idle speed improperly adjusted hot idle speed should be 950 RPM to 1000 RPM.
9. Air/fuel mixture screw improperly adjusted.
10. Water or dirt in the fuel system, carburetor or filter.
11. Restricted, blocked or kinked fuel line.
12. Fuel tank empty.
13. Gas cap is not venting properly or fuel tank venting system blocked.
14. A failed fuel pump, pressure regulator and or fuel injectors.
15. Vacuum line from intake manifold to petcock broken, cracked, or not attached, carburetor vent line plugged.
16. Needle and seat stuck closed in the float bowl.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
2005 2008 BMW K1200R K1200RS Service Manual Moto Data Project
BMW Motorcycle Parts Fiche OEM BMW Motorcycle Parts online 1970 present BMW
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e
Posted on Jan 04, 2016
Hi and welcome to FixYa,
Your described problem could be the battery but I am also inclined to suspect the voltage regulator. If the 'splutter' is when revving/higher RPMs, then the CDIs are cutting off possibly because of higher than normal voltage from the regulator and/or the battery is not loading the system(charging). Try charging the battery externally for at least a couple of hours, try and observe. You can also have the battery tested. If the battery checks good, accepts a charge and the bike will run normally after being charged, then the regulator must be considered.
Good luck and thank you for using FixYa.
Posted on Feb 11, 2009
mate adjust the mixture screw on the carb to its correct setting in the manual and put the idle screw in a bit so the revs rise a tad good luck
Posted on Jul 07, 2009
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