Question about 2002 Buell Blast

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Why does a 2002 buell blast backfire through the carb when given throttle?

Buell blast sputters and backfires when given throttle like it is loading up and does it every time what is that?

Posted by Anonymous on

1 Answer

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  • Buell Master
  • 40,859 Answers

Hi, Anonymous popping on deceleration is usually caused by an air leak in the exhaust system and is generally located where black carbon soot is seen as a flashing build up from any joint connection. This condition can easily be remedied by removing and cleaning both joint pieces and reassembling with high temp silicone and the correct torque applied to the exhaust clamps where present. Coughing is usually caused by an air leak in the intake system and will generally have the same telltale signs of location by a wet or damp buildup of oil/gas seepage at the intake manifold to cylinder head or carburetor connection and in rare instances a worn throttle plate shaft and or seals. Spitting is usually caused by a faulty accelerator pump and or nozzle, or the float bowl needle and seat leaking and overflowing through the main jet mixing well nozzle, or the air-fuel mixture screw set to lean. 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. http://www.badweatherbikers.com/buell/messages/20164/150578.html?1444533833
Thread What it mean when bike backfires through the carb
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Posted on Jan 08, 2016

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Posted on Jan 02, 2017

  • 2712 Answers

SOURCE: Buell Backfiring

hesitate and then stall out completely. When I restart the engine it  immediately turns over as if nothing has happened.While in neutral I can rev it to redlineno problem. This will happen inconsistentlymaybe every few months on  average. Could it be the fuel,the line, the EFI? Any ideas?,I personally think its the pushrod valves with the EFI. I think that the EFI responds in a quick blip faster than the pushrods can open the valves, so you don't have as good atomizing of the air/gas charge. Just the nature of the beast. Course, this is assuming you have had your TPS set and shes good and broken in.,,,

Posted on Nov 10, 2008

  • 22 Answers

SOURCE: Buell blast is backfiring. Sat for 2 years so,

If you did not completely disassemble the carb and remove all jets/emulsion tubes/needle valves then you did not clean the carb adequately. You could try adding either Seafoam, the Yamaha CARB-CL-EAN-ER, or Techron fuel system cleaner in an auxiliary gas tank and running the engine for a short while to ensure the mix gets into all the nooks and crannies. Let it sit for a couple hours to do the work, then drain out the float bowl, hook up the bike's gas tank and see what happens. Otherwise you need to remove, strip, clean, reassemble, and reinstall the carb.

Posted on Feb 26, 2009

mxoutlaw
  • 14 Answers

SOURCE: sputter or back presure 2000 Buell Blast

If starts fine and idles,pilot jets are operating,if bogs under power,check air filter first..no filter to lean...dirty filter to rich.Check fuel filter for unrestricted flow.Have the feul/air mixture screws been turned? Factory is 1 1/2 turns out from bottom

Posted on Jul 25, 2009

sisadsl
  • 1508 Answers

SOURCE: I have a 2002 Buell Blast that runs rough after

check valve clearances, and low voltage can cause backfire, battery voltage should rise when revved, use a digital multy meter

Posted on Apr 04, 2010

  • 1 Answer

SOURCE: 2002 buell blast is running rough - missing - backfiring

Wow, my 2002 blast is doing the same thing, or at least it was untill it blew a hole through the exhaust and quit running all together. Time for a sportster.

Posted on Sep 05, 2010

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1 Answer

Buell blast carb leaks fuel flooding


Hi, Anonymous and the usual suspects are:
1. Dirt or other foreign matter between float valve and its seat.
2. Float valve sticking.
3. Float valve and/or valve seat worn or damaged.
4. Float misadjusted.
5. Float cracked, leaky or damaged.
6. Excessive "PUMPING" of hand throttle grip.
For more information about your issue and free downloads that you will need please visit the websites below, and for specific information or questions you can reach me at xlch@mail.com. Good luck and have nice a day.
http://www.buellxb.com/forum/showthread.php?27990-Carb-leaking-fuel-into-airbox
http://www.badweatherbikers.com/buell/messages/20164/159879.html?1153777442
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Hi, Anonymous and the usual suspects are:
1. Idle speed improperly adjusted.
2. Inlet system air leak.
3. Leaking accelerator pump.
4. Loose low-speed jet.
5. Plugged low-speed jet.
6. Contaminated or plugged low-speed circuit.
7. Enrichner valve is not seated or leaking.
For more information about your issue and free downloads that you will need please visit the websites below and for specific information or questions you can reach me at xlch@mail.com. Good luck and have nice a day.
http://www.badweatherbikers.com/buell/messages/20164/737306.html?1398696120
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2006 buell blast struggles to start and barly idles


Then your carb IS NOT CLEAN or IS NOT ADJUSTED PROPERLY. Flooding is a direct result of your carb having issues.

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2002 blast 500 starts an only runs about 4 min an stalls an wont start back up it may start the next day


Hi, Mdtrikeman 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.
Buell Blast Motorcycle Forum 2000 Buell Blast Stalls When Idling BadWeB
http://www.buellxb.com/forum/showthread.php?42173-03-Blast-stalls-when-given-gas
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2007 buell blast starts and idles but stalls when given throttle


Hi, Davedodt for more information about your issue and free downloads that you will 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.
http://www.buellxb.com/forum/showthread.php?31501-Idles-fine-bogs-and-dies-with-more-than-1-4-idle
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Sep 26, 2010 | 2002 Buell Blast

1 Answer

Sputter or back presure 2000 Buell Blast


If starts fine and idles,pilot jets are operating,if bogs under power,check air filter first..no filter to lean...dirty filter to rich.Check fuel filter for unrestricted flow.Have the feul/air mixture screws been turned? Factory is 1 1/2 turns out from bottom

Jul 24, 2009 | 2001 Buell Blast

3 Answers

2002 buell blast is running rough - missing - backfiring


hard to say w/ seeing it; it does sound as if they replaced everything w/o really finding the problem first; try better fuel and clean petcock; when dies is it electrical( all lights out) or does it sputter and choke off? sorry; I know it can be frustrating check all wiring under seat looking for loose or broken connectors or ground wires

Jun 28, 2009 | 2002 Buell Blast

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