82 slight stumble just above idle


Information and questions on GL1100 Goldwings (1980-1983)
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racer59
Posts: 7
Joined: Wed Jun 15, 2011 11:01 pm
Location: Grafton,WI
Motorcycle: 1982 GL1100 interstate

82 slight stumble just above idle

Postby racer59 » Wed Jun 15, 2011 11:13 pm



Hi All, I am new here. I've had my carbs off a couple times now and I still have the same symtoms. As I drive through town at about 2500 rpm the engine has a slight miss. It starts easily, idles well, starting off from a dead stop is a little rough, but it accellerates strong and cruzes nice and smooth on the highway (3000 rpm and above). What the heck gives? Any ideas? Any and all help is appreciated.



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virgilmobile
Posts: 7663
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 82 slight stumble just above idle

Postby virgilmobile » Thu Jun 16, 2011 3:32 pm

Did you do a accurate carb sync?Even a little off (2"difference)is noticeable in the 1000 to 2000 rpm range at low throttle opening.The closer you can get the vacuum at the 1000rpm range,the smoother and more even the cylinders will fire and pull off idle.Carb sync errors are not so apparent above 2500rpm

User avatar
virgilmobile
Posts: 7663
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 82 slight stumble just above idle

Postby virgilmobile » Thu Jun 16, 2011 3:40 pm

Did you do a accurate carb sync?Even a little off (2"difference)is noticeable in the 1000 to 2000 rpm range at low throttle opening.The closer you can get the vacuum at the 1000rpm range(0 difference or less than that),the smoother and more even the cylinders will fire and pull off idle.Carb sync errors are not so apparent above 2500rpm.Also float level must be the same for accurate fuel supply.Even if the sync is perfect,if the fuel level is different,one cylinder may be starving for fuel causing uneven power at the crank from each cylinder.Lastly,adjust the valves,gap the plugs,replace the air filter and gas filter.

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littlebeaver
Posts: 4420
Joined: Mon Sep 21, 2009 6:11 pm
Location: Kansas City, Kansas
Motorcycle: 1981 gl 1100 I , 79 Yamaha XS11
Special, 82 Kawa 750 CSR, 82 Kawa 750 LTD, 03 Kawa Nomad 1500, 99 Kawa Voyager 1200

Re: 82 slight stumble just above idle

Postby littlebeaver » Thu Jun 16, 2011 5:44 pm

vacuum advance may not be working proper...




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