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Back fires rich exhaust - Motorcycles

2 Answers

damo

Expert 122 Answers
Posted on Dec 02, 2016

damo

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Usually a motoecycle that back fires when you roll.off the throttle is one of two simple things.
1. You are running lean on thw pilot jet.
Or
2. You have an air leak in your exhaust.

Claude Kayser

Motorcycles Master 9,098 Answers
Posted on Jan 31, 2016

Claude Kayser

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Preventing Backfire on Motorcycle Exhausts ' DoItYourself ...

www.doityourself.com/.../5-tips-to-preventing-backfire-on-motorcycle-e...

When the engine on your motorcycle has an emission system malfunction, such as anexhaust leak or a moment of running rich or running lean, backfire can ...

Exhaust backfire, popping when letting off throttle - Motorcycle Forum

www.motorcycleforum.com > ... > General Motorcycle Discussion

Apr 26, 2009 - 28 posts - ‎17 authors
Exhaust backfire, popping when letting off throttle General Motorcycle Discussion. ...You can damage the engine by running too lean or rich. Backfires on deceleration
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Bad smell from ac when turned on today smells like exhaust

* Stop using car!
* Check for breaks or cracks in exhaust pipe system.
* Check for cracks, rust holes in fire wall. (the wall between you and the engine.
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Aug 07, 2018 • AC Cars & Trucks

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95 dodge dakota back fires above 2000 rpm

A tune-up is always a good idea. Is the system running rich or lean? Any applicable trouble codes? Is it back firing out the exhaust? If so, I got two thoughts, either an exhaust system problem or exhaust valves?

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Jun 13, 2016 • 1995 Dodge Dakota

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2002 s55 amg doesnt have full power and back fires occaisionally. one catilyc converter get very hot fast.

the reason that the catylitic converter is hot is because of a rich condition in the engine, one cylinder is not firing. This is most likely the cause of the back fire that you are having. It may be related to the tapping sound if it is a valve that is bend or broken.

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Apr 19, 2013 • Exhaust for Mercedes-Benz Mercedes Benz...

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I have just changed out a 1200 vw motor and set the timing at 6 1/2 the motor runs good.but when I test drive it it studers ,is low on power

IF EXHAUST BACK FIRES MIXTURE IS TOO RICH-TURN SMALL CARB SCREW ANTICLOCKWISE A TOUCH WITH ENGINE HOT AND TEST DRIVE.
if you get spitback in carb.sounds abit like a back fire but causes lurching-bucking effect on road then mix is too lean-opposite of above-turn small screw a touch clockwise
take out spark plug to see if its tip is black mix is too rich
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spark plug should be slightly brown for healthy engine

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Sep 22, 2010 • Volkswagen Beetle Cars & Trucks

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If my harley is back firing out the exhaust after de- exceleration, is this burning too rich ??? what should I do??? It now has a 1200 sporty carb on it with 180 main jet with a 42 idle jet. I have mixture...

It may be too rich on decel...but it is more likely an exhaust leak. Do Harleys have mechanical valve lash adjustments? If you do then I would also recommend checking the clearances on the exhaust valves.

Good luck and be careful.

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Mar 22, 2010 • 2005 Harley Davidson XL 883L Sportster

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Running rich and other stuff

Check your carbs and air filters

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Mar 11, 2010 • 2007 Suzuki Boulevard ltd

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Back firing when throttling down

make sure the exhaust flanges are tight at the engine, also make sure the engine is not running to rich, u can do this with a gas analyzer

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Oct 09, 2009 • 2000 Yamaha V Star 1100 Classic

0helpful

1answer

Runs rich and miss fires

Make sure the spark plug wires are on right (propper firing order), and check the TPS sensor. Are there any exhaust leaks or vacuum leaks? Did you use the original intake manifolds and Holley throttle body? If not you need to replace the PROM chip with the one from the donor car.

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Sep 20, 2009 • 1986 Pontiac Fiero

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New exhaust on my wr 450f and its gargling and back firing

You have probably restricted the exhaust too much. Causing it to run rich. you will have to adjust your air mixture screw and lean it out. But first, check the color of your spark plug. Lean it out if it's dark, richen it if it's white. Your looking for a nice carrot color. The plug never lies. :)

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Sep 19, 2009 • 2005 Yamaha WR 450 F

7helpful

1answer

YZ250F is back firing when let off the throttle. Would hot start sticking cause this problem?

no buddy your mixture is too rich which means to much fuel is going in and not enough being burnt so the access fuel goes in the exhaust and then gets burnt in the exhaust which is a explosion so you get a back fire to cure this problem you need to screw the mixture screw in which is located on the carb a picture below will demonstrate turn this screw 1/4 of a turns in this will decrease the amount of fuel going in and stop backfiring good luck bud

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Aug 30, 2009 • 2004 Yamaha YZ 250 F

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Back fires rich exhaust - Motorcycles

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damo

Claude Kayser

Preventing Backfire on Motorcycle Exhausts ' DoItYourself ...

Exhaust backfire, popping when letting off throttle - Motorcycle Forum

Glad That You Asked. Why Do motorcycles Backfire? at Cyril ...

Is backfire when decelerating a bad thing? : motorcycles

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Related Questions:

Bad smell from ac when turned on today smells like exhaust

95 dodge dakota back fires above 2000 rpm

2002 s55 amg doesnt have full power and back fires occaisionally. one catilyc converter get very hot fast.

I have just changed out a 1200 vw motor and set the timing at 6 1/2 the motor runs good.but when I test drive it it studers ,is low on power

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YZ250F is back firing when let off the throttle. Would hot start sticking cause this problem?

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Bad smell from ac when turned on today smells like exhaust

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Back fires rich exhaust - Motorcycles

2 Answers

damo

Claude Kayser

Preventing Backfire on Motorcycle Exhausts ' DoItYourself ...

Exhaust backfire, popping when letting off throttle - Motorcycle Forum

Glad That You Asked. Why Do motorcycles Backfire? at Cyril ...

Is backfire when decelerating a bad thing? : motorcycles

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Related Questions:

Bad smell from ac when turned on today smells like exhaust

95 dodge dakota back fires above 2000 rpm

2002 s55 amg doesnt have full power and back fires occaisionally. one catilyc converter get very hot fast.

I have just changed out a 1200 vw motor and set the timing at 6 1/2 the motor runs good.but when I test drive it it studers ,is low on power

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YZ250F is back firing when let off the throttle. Would hot start sticking cause this problem?

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Bad smell from ac when turned on today smells like exhaust

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