Honda had a blown head gasket fixed that now runs real rough backfiring out of carb so we rebuilt the carb still running rough and backfiring
That is a car not a motorbike. Bikes only have 2 wheels. But you may want to set up the cam and ignition timing. it is only timing that will cause backfires.
SOURCE: 1995 vulcan 800 gas comin out carb intake
This sounds like a carb float being stuck open. Turn off the gas and drain the offending carb. Next, turn the gas back on and sharply tap the float bowl with the plastic handle of a screwdriver as the fuel bowl refills. The goal here is to vibrate the float to free it up. If doing this process a couple of times does not free the float I would remove the carb and clean it with a spray carb cleaner. Pay special attention to the float needle. Clean the air filter then re-mount carb. Next Remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Now would be a good time to install an in-line fuel filter if you don't already have one.
Install new stock spark plugs AFTER you make sure that the bad cylinder is getting spark. Be sure to balance and sync the carbs when finished.
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SOURCE: Misfire and backfire at low rpm, runs rough at low rpm
You did not say whether or not this was a carburater engine but from the sound of it one of your jets may be sticking, a good cleaning of the jets will most likely fix the problem, the likely cause is a small build up or piece of debris on the jet.
SOURCE: need some diagrams. honda gl 1100 1982
You can find all the diagrams you will ever need here. It might take a while to download so be patient. Good luck. Rate me if I've helped you.
Thanks.
http://www.goldwingdocs.com/#Manuals
SOURCE: Honda NTV 650 Deauville Head Gasket
Leaking from the black o/flow pipe in traffic,.....check your fan switch/radiator fins(clogged?) hope this helps....dave
SOURCE: honda 1300c backfire through carb at wide open
If you have used Dyno jet kit I have had a kit come through with smaller main jets than the stock ones causing it to run way to lean.
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