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'82 gs 450 t; exhaust backfireing /popping. why?

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Posted on Jan 02, 2017

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SOURCE: GS CAMS

unfortunately I can't give you any technical details since my knowlegde of the GS (or any other bike in that matter) is very limited. However there are a copple of ways you can use your internet connexion to find out more: 1. try http://www.gsresources.com (= GS(X) site worthwhile!) 2. try http://www.google.com and search for intake cam suzuki gs 750 (or otherwise)

Posted on Nov 10, 2008

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Back fires rich exhaust


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Is backfire when decelerating a bad thing? : motorcycles


Jan 31, 2016 | Motorcycles

1 Answer

I have a 2004 wr 450, when I got it out this year and started it I noticed that it pops through the exaust a lot. What can cause this?


Hi, Anonymous popping or backfiring on deceleration is usually caused by a lean fuel condition or 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 torquing the exhaust clamp to the proper spec. Coughing is usually caused by an air leak in the intake system and will generally have the same telltale signs, a wet or damp buildup of oil/gas seepage at the intake manifold to cylinder head or carburetor to intake manifold 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 is adjusted too lean. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
2004 wr450 with bad backfiring issues Page 2 WR 400 426 450
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YAMAHA WR450F Owner Service Manual
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May 13, 2014 | 2004 Yamaha WR 450 F

1 Answer

2005 crf450 is back firing


Hi, Anonymous if your carburetor/exhaust is:
COUGHING is usually caused by an air leak in the intake system and will generally have the same telltale signs, a wet or damp buildup of oil/gas seepage at the intake manifold to cylinder head or carburetor to intake manifold connection and in rare instances a worn throttle plate shaft and or seals.
POPPING on deceleration is usually caused by a lean fuel condition or 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 torquing the exhaust clamp to the proper spec.
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 is adjusted too lean.
BACKFIRING is usually caused by a sticky/tight intake valve or a timing issue, 180 degrees out or cam chain off 1or 2 teeth.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Honda CRF450X 2005 Service Manual
http://www.partsfish.com/page/oem-parts-for-honda
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Aug 01, 2012 | 2005 Honda CRF 450 R

1 Answer

Fix yz 450 backfiring


Hi, Anonymous popping or backfiring on deceleration is usually caused by a lean fuel condition or 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 torquing the exhaust clamp to the proper spec. Coughing is usually caused by an air leak in the intake system and will generally have the same telltale signs, a wet or damp buildup of oil/gas seepage at the intake manifold to cylinder head or carburetor to intake manifold 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 is adjusted too lean. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Dirt Rider Magazine
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YAMAHA YZ450F Owner Service Manual
OEM parts for Yamaha
http://www.yamaha-motor.com/assets/service/manuals/2004/lit-11626-17-11_784.pdf

Mar 22, 2012 | 2005 Yamaha yZ 450 F

1 Answer

Popping and backfires when decellerating


The primary cause for backfiring on deceleration is an air leak - if the baffles have been removed or modified or if the gaskets in the exhaust tract are not sealing properly, fresh air can be introduced into the exhaust stream causing a pop or backfire. Check your exhaust system - especially if you have recently had an oil change, since the pipe has to be removed to change the oil filter on this model.

Jun 22, 2011 | 2005 Yamaha V Star 1100 Silverado

1 Answer

I have a 2004 CRF 450 totally stock that had a top end rebuild about 6 months ago. I have had the bike out about 6X and i have noticed that when i let off the gas it backfires/pops more than normal. Also,...


Hi from Spain,

coul be related to lean mixture during deceleration that makes the exhaust hotter that make the blow-by gas to "explote". Check all carburator spec. are under standar, especially slow jet and slow screw adjustament.

br,

Emilio.

Nov 29, 2010 | 2004 Honda CRF 450 R

1 Answer

Is popping or backfire normal?


Two things can cause popping or backfiring on deceleration. The most common is air leaking into the exhaust through the exhaust pipe copper o-ring gaskets. This typically happens when the exhaust is replaced without removing the old ones (doubled up) or simply reusing the old gaskets and they don't seal. The other thing that can cause popping is bad air cut diaphragms on the carburetors. If they are old and sticky or have holes in them they don't properly shut off the gas on deceleration causing the backfire.

May 06, 2010 | 2002 Honda VT 750 CD Shadow A.C.E. Deluxe

2 Answers

82 GPZ 750 R1 w/ mac 4/1 exhaust Will the lack of exhaust gaskets affect compression?


No

But it will affect how well it idles and reduce your torque due to a lack of back pressure.


May 05, 2010 | 1976 kawasaki Z 750

1 Answer

GS CAMS


unfortunately I can't give you any technical details since my knowlegde of the GS (or any other bike in that matter) is very limited. However there are a copple of ways you can use your internet connexion to find out more: 1. try http://www.gsresources.com (= GS(X) site worthwhile!) 2. try http://www.google.com and search for intake cam suzuki gs 750 (or otherwise)

Nov 10, 2008 | 1979 Suzuki GS 750 E

1 Answer

Backfire


the bike will like backfire/misfire and if i hold the throttle steady it will backfire like 2 times again....and it does this while riding at a steady pace too...it just started it didint do it a week ago. i didnt change anything except a new air filter..fuel screw is 2.5 turns out . the timing valve clearances and everything is in spec. is this a sympton of it being rich or lean? and it doesnt do it on chokeYes, it could (and probably is) be an air leak. Check to be sure the carb is tight in the intake manifold, and make sure the hot-start isn't loose and is sealing properly. Also make sure all of the exhaust system joints are tight, an air leak in the exhaust will make a four-stroke pop and backfire like an old work truck with no muffler...,,,

Nov 10, 2008 | 2002 KTM EXC 200 GS

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