Question about 2005 Hyosung GT 650 R

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My bike is backfireing /why? - 2005 Hyosung GT 650 R

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Either partially fouled spark plugs, bad spark plug caps, or leaking exhaust gaskets in the head and muffler connections.

Posted on Oct 02, 2010

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Posted on Jan 02, 2017

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Backfire on 2010 flstc?


Backfiring is caused by a lean air/fuel (A/F) ratio. A leaner A/F ratio takes longer to burn and will continue to burn in the exhaust, hence the backfiring. Is the bike stock, or have you changed the air cleaner or pipes? Both of these changes will result in a leaner A/F ratio. HD bikes with fuel injection already run lean to meet emissions requirements, so changing pipes, etc. will make the problem worse. If you have not made any changes to the bike, make sure that the fuel system is clean and you are using good quality gas. You can also have the bike's computer (ECU) remapped to run a little richer. Your dealer may be able to do this for you, or there are aftermarket ECU tuners available for your bike that can adjust the fuel map and ignition. These will give you the added benefit of more power and a cooler running engine.

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1 Answer

Backfiring


4000 rpm ???????

Feb 14, 2012 | 2000 kawasaki ZX-9 R Ninja

1 Answer

Dos,nt take gas bake firing


I have the same bike with 8000 miles on it., Alot of bikes backfire especially these with the emissions package. I'm a smog tech and what backfiring means is detanation from a lean condition. The cylinder gets hot on decel and you get the pop. You could go the sabrehood forums and register and talk to people about these bikes.

What I did was put a k/n filter. put a stage 2 jet kit and a cobra slash cut exhaust and this seemed to reduce the amount of backfireing alot.
Bikes loud and maybe a little quietier exhaust would of been better but for now bike runs alot better.
Hope this helps

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2002 VTX 1800 backfires recelerating


If the bike is fuel injected, the module should fix it. If the bike is carbureted, you don't need the module but you will need to re-jet the carb to enrich the mix.

Nov 08, 2009 | 2004 Honda VTX 1800

1 Answer

Motorbikes backfires, and is irratic with accelration.


Nice bike and an annoying issue. Backfire is unburnt fuel that then detonates.

Hopefully, it's just a plug going bad. Pull the plugs and see which one is black/wet. That will be the tell tale sign which cylinder is acting up.

I'd replace all, set the proper gap and install them and take it for a test drive.

Good luck hope this is a simple fix.

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1 Answer

Bike is backfiring through carb.


do u have the correct spark plug the one recommended by the manufacturer

Aug 02, 2009 | 2001 Harley Davidson FXDXT Dyna Super...

1 Answer

Bike backfires,dies,restarts runs fine


your carbs are dirty. and probably need to be balanced also... bring the bike bto a garage and have them cleaned by a profesional.... also after market pipes don't give your bike the proper back pressure .. that can mess up your carbs timing

Jun 16, 2009 | 1996 kawasaki VN 1500 Vulcan Classic

1 Answer

1981 Wide Glide Bike is missing and backfiring


open up the ignition cover plate and check the backing plate. it may have come loose and threw the bike out of time.
make sure your plug wires are plugged on tight and the coil wires are secure.
It is most definitely a timing problem.

Jun 05, 2009 | Harley Davidson FXDWG Dyna Wide Glide...

1 Answer

Bike backfires and misses.


Run some Seafoam through the carbs. Should be available locally at a parts store. Mix with your gas according to directions. This will clean out the carbs, which sound like they are a little gummed up.

May 29, 2009 | 2003 Honda VTX

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