Carb identification

[Roemy24]

I know you guys on here are real good but I want to push you a little. I have a 1980 GS850L that was having carb trouble. I happen to stop buy a Motorcycle salvage heaven and found what I thought where identical (already pulled off.) Looks like someone just rebuilt them because I couldn't believe the shape. Make a long story short they don't fit. The linkage is a little shorter so it won't match up with the intake and airbox. I got my bike running and would like to sell these to someone on here or Ebay that needs a nice set (diaphrams look perfect) and everything moves. I want to know what they are off from (size at least and maybe year.) I'm assuming it's a GS, they are Mikuni, 32mm and a "D" is stamped on the bottom of all the bowls. Pictures attached.

[Roemy24]

another pic

[Roemy24]

3rd pic attached

[Roemy24]

last pic attached, any ideas?

[SqDancerLynn1]

Just a guess because the center carbs are real close either a 650 or 550
do you know what jets are in it ??? Check & compare it to the carb jetting list

http://www.thegsresources.com/_forum/showthread.php?t=73723

[Guest]

Measure the intake side throat with a caliper. I bet they measure 34mm. Your carbs are 32mm.

[Roemy24]

Sqdancer: Main jet is a 92.5. Pilot Jet is a #40. I'll work Thursday night is checking all the rest. Is there any thing else I can check to help identify?

Chef: 32mm for sure. I measured when I bought them and knew that that part matched. That's why I'm confused on what they are for. My father as an 82 GS650L and his look to be even smaller, like 28 or so. The way the choke assembly works I'm guessing it's from a 80 or 81 something. Possibly 750?

[ALB80-850]

What are you looking to get for them?

[Guest]

It is from an 80-81. They changed the choke actuator for the 82-83.

[Roemy24]

Chef, that is what I was thinking was an 80-81. I'm going to take apart on Thurs. and get all the numbers from the jets. Hopefully that will me the tell what they are.

[Guest]

You can swap the linkage from the stock carbs.

[alke46]

They look just like the ones I had on a previous '81 GS 850G.

[Roemy24]

Chef, I was going to do that but getting the butterfly out looked to much for my skills and tools. Then if I did successfully drill out the stamped screws how would you go about getting them stamped to stay in place again?

[Guest]

I was referring to the choke and throttle linkage attached to the top of the carbs. I would not swap out the butterflies.
Now I'm confused on what didn't fit.

[Roemy24]

I attempted to put the carbs back together and realized they needed to be farther apart. Not a problem so I used my rails to hold them together, and changed a few other things. I checked the throttle and what happened was 3,4 four move and 1,2 moved but not all together. That's the linkage I was refering to. The link between the two in the middle wasn't long enough. Make sense, I didn't explain that the best.