GL1200 Fuel problems


Information and questions on GL1200 Goldwings (1984-1987)
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Phatphubar
Posts: 2
Joined: Sun Mar 25, 2012 5:33 am
Location: Halifax, Nova Scotia, Canada
Motorcycle: 1984 GL1200 Interstate the 3rd in a series of resurrections

GL1200 Fuel problems

Postby Phatphubar » Sat Aug 10, 2013 5:36 pm



My 84 gl1200 interstate carburated bike , was running ok last year but not great. Disassembled the carbs and found a torn diapham in 1 carb

Ordered a used carb on ebay ,

I installed the new(used carbs) and started bike couldnt get is above idle befor stalling ..removed the carbs.
So installed 1 new (used) diaphram including needle assembly in the bad carb reset all idle screwd to 4.5 turns and replaced the fuel cut off spring and diaphram with the better one from the used carb.
Still trouble with beyond idle stalling..

I then saw a post on here about the fuel pump contact points and that helped a lot.

Starts immediately and seems like it runs on 3 cylinders rpm seems to go to redline ok but no power much under load , finally gets up to speed on highway but no real acceleration. burns a lot of fuel fast....
Should i change all of the needles are they worn to the port and leaking? perhaps i should have changed that 1 carb fully.
My riding season is shot almost and I cant afford to take to the shop...
Help

Phatphubar



User avatar
virgilmobile
Posts: 7646
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: GL1200 Fuel problems

Postby virgilmobile » Mon Aug 12, 2013 9:58 am

I'd first get it running (idle for 15 seconds)..shut it down...turn OFF the fuel....Find the dead cylinder(lightly tap the header) by checking for heat...
The cold header is a dead cylinder.
Open the drain screw and verify that the carb for that cylinder has gas...
If it does,either the cylinder has low compression(below 100 psi),no spark or the entire carb is plugged up....
One thing at a time..
spark at the plug,
compression
enough fuel
One of them is bad.....
Also...if one cylinder has a problem,the other 3 have to work harder thus the extra fuel consumption.

Phatphubar
Posts: 2
Joined: Sun Mar 25, 2012 5:33 am
Location: Halifax, Nova Scotia, Canada
Motorcycle: 1984 GL1200 Interstate the 3rd in a series of resurrections

Re: GL1200 Fuel problems

Postby Phatphubar » Mon Aug 12, 2013 1:14 pm

Thanks will check today
Phubar...


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