Question about 2002 Buell Blast
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
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 firstname.lastname@example.org. 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
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
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
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
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
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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