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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 ...
Jun 12, 2010 - A visible flame may momentarily shoot out of the exhaust pipe. ...Another backfire situation occurs when the engine is running rich, meaning ...
? 10:57 https://www.youtube.com/watch?v=pcEeGhvPxq4
Sep 18, 2012 - Uploaded by dawino6260
just a heads up, unless you have the fuel pump relay jumped out, it will not .... Honda Goldwing gl1200 Single Carb Coversion and Alternator ...
? 0:21 https://www.youtube.com/watch?v=o2Kb16Iw3pw
Jun 12, 2012 - Uploaded by virgilmobile1
Gl1200 checking fuel pump relay ... Pt.2 1986 Honda XL600R How To Replace The Fork Seals - Duration: 8:56. by D-Ray Smith 20,179 views.
BACKFIRE OCCURES DUE TO RUNNING TO RICH AND EXPELLED UNBURNED RAW FUEL EXPLODING IN TAIL PIPE.WHEN COOL AIR HITS IT FROM DECELERATION THE ENGINES SUCKING IN MORE AIR CAUSING IT..A LITTLE BACKFIRE IS NOTHING TO WORRIE ABOUT IF ITS A CANNON GOING OFF YOU NEED TO ADDRESS IT..THE FUEL TO AIR MIXTURE ISNT CORRECT..I WOULD LEAN IT OUT ALITTLE.
It is pretty normal for many engines to backfire while decelerating. Bikes have much shorter exhaust and much less sound control so it is much more obvious. If it is running good while idleing and while accelerating it's probably not a fault.
Exhaust leaks near the exhaust port can draw air into pipe on deceleration and detonate any unburnt fuel leaving engine, causing backfire and high temps.
An overly lean fuel mixture on the engine can make decel backfire worse too.
check Oxygen sensor and associated wires. if you have access to a scan tool watch the sensor signal. it should resemble a smooth wave at idle with engine warm, if its anything else you need a new sensor.
has good power and I got a great deal. I just ordered the Clymer manual (3-5 days delivery) so I am posting here to see if you folks have any quick suggestions. I noticed that the engine has a slight backfire/sputtering on deceleration and would take a while to warm up so I was thinking that it was running a little on the lean side. There was also some minor bluing on the exhaust. I took the plugs out last night and they appeared to be fouled. They were coated with carbon (not wet oil). Now I was thinking that it might be running a little rich. I cleaned the plugs and re-gapped at .0035. The engine seemed to warm up quickly but the it was still sputtering a little when downshifting and decelerating. What do you think this is? yeah backfiring while decelerating or downshifting can mean that you are running a little rich. I adjusted the idle screws on my bike to make that problem go away. Makes sense since as you slow down you normally release the throttle to virtually closed anyway...
I havent had that problem since. Except now I get backfiring while riding at highway speeds... methinks my carbs are being flooded and the float levels need to be adjusted.,,,
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