Question about 2008 Buell Firebolt XB12R

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Runs fine cold

Riding along and bike stopped, after cooling off bike ran again but weak, now left overnight cranked and ran perfect then sputtered and stopped. Put fuel in thinking it was empty after first shutdown at the time it did not help, thought it was a system priming issue at first but now maybe you can help.

Posted by Anonymous on

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  • Buell Master
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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 and free downloads that you need please visit the websites below and for specific information or questions, please feel free to contact me at xlch@mail.com. Good luck and have a nice day.
06 Buell Xb12r Stalling Issues Sportbikes net
Buell Sputtering and Stalling
Buell Service Manuals PDF Download
TWIN Motorcycles Buell parts
2008 Buell Firebolt Owners Manual 99475 08Y eBay

Posted on Jan 10, 2016

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Posted on Jan 02, 2017

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ultrat
  • 500 Answers

SOURCE: fuel pump is not priming when the key is turned

Check here 2,, http://www.hdtalking.net/

Posted on Aug 16, 2011

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