Backfiring in the carb


Information and questions on GL1000 Goldwings (1975-1979)
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YourJere
Posts: 39
Joined: Sun Sep 08, 2019 8:29 pm
Location: Waller, Texas
Motorcycle: 1977 GL1000

Backfiring in the carb

Post by YourJere » Wed Dec 11, 2019 9:23 pm



My carbs were flooding with gas in the plenum now I fixed that issue and the carb seems good, But with the choke on in the left side of the carb I can hear a noise I think is that little piston in the carb.
But on low throttle or idle the bike has a flash of fire in the air box from backfiring and makes a popping sound. But it doesn't pop at higher throttle. If its a carb issue what would it be?
And what are other things that might cause this.



User avatar
YourJere
Posts: 39
Joined: Sun Sep 08, 2019 8:29 pm
Location: Waller, Texas
Motorcycle: 1977 GL1000

Re: Backfiring in the carb

Post by YourJere » Wed Dec 11, 2019 11:45 pm

It has seemed to fix itself for now.

Katz1002
Posts: 3
Joined: Sun Dec 01, 2019 10:24 pm
Location: Sadler
Motorcycle: 79 gl1000

Re: Backfiring in the carb

Post by Katz1002 » Fri Dec 13, 2019 4:31 am

Theres quite the myriad of things

1. carb sync you've toyed with the carbs so obviously you may need to resync them the procedure can be found from google.

2.check out everything ignition wise new plugs, caps, points etc unless newish already.

3. Check compression on that cylinder you may have a burnt valve or a valve that's slightly held open and you need to do a valve clearance adjustment. Google again.

4.that weird noise you hear when cranking it over with the choke on mine does it too with the air box disassembled

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