Just another carb-question

[NaeKid]

So, I finally had some time today to try to work on my carbs (I have been trying to make time for quite a while now), so I do what I need to do and all of a sudden I notice a problem with the bottom-side of my carbs ... there seems to be something missing in the area where my floats should be mounted.

Can anyone help me identify the issue from the picture

[NaeKid]

Here ... maybe I can help you a bit ...

There seems to be a missing section from the pivot for the floats!!!

Has anyone rebuilt those posts or would I be better to locate a new bank of carbs for my bike? I think I now fully understand why my floats didn't seem to work properly.

[cowboyup3371]

Looks like posts are missing on two carbs. How did they melt like that?

[NaeKid]

To me, it looks like they snapped off (possible due to one of the previous owners). I think that they may have been like that for a while as I could not find any of the missing pieces. Someone might have tried to do some carb-work and when punching out the pin, punched too hard.

[GateKeeper]

if you don't have the missing parts not much you can do, if you do, you can try and use some JB-Weld to reattach the posts ? or find another set of carbs, either a whole bank, or just the 2 that seem to have issues..

[NaeKid]

My current plan is to visit one of the local motorcycle recyclers tomorrow after work (local's will know of TJ's Cycle) to see if they have anything that will be able to help me out.

I did a quick search on eBay and found a bank-of-four on there, but, from a '79 - they look totally different so I don't think I should even try.

Someone else took apart a bank of carbs and is selling the pieces individually, so, if I have no luck locally, I might consider that route.


I think I want to cry in my beer tonight

[terrylee]

Ones from 79 won't work on yours, although you might do a search on here, it maybe poss. with some mods.? terrylee

[MisterCinders]

1979 850s had VM carbs, and those won't fit the head on your bike. You have CV carbs. The specs for yours are:

GS850 Carb Specs:
Measurements = mm (in.)
Carburetor type = Mikuni BS32SS
Bore Size = 32 (1.26)
I.D. No. = 45110
Idle rpm = 1050 +/- 100rpm
Fuel Level = 5.0 +/- 0.5 (0.20 +/- 0.02)
Float Height = 22.4 +/- 1.0 (0.88 +/- 0.04)
Main Jet = #115
Main Air Jet = 1.7
Jet Needle = 5D50
Needle Jet = X-5
Pilot Jet = #40
Bypass = 1.0, 0.8, 0.8
Pilot Outlet = 0.7
Valve Seat = 2.0
Starter Jet = #32.5
Pilot Screw = Preset (actually, these can be adjusted - start with about 2 turns out from lightly seated)
Throttle cable play = 0.5-1.0 (0.02-0.04)

Do some hunting for "BS32SS carbs" on eBay. These are used on several models, so you should be able to find a rack to cannibalize for new bodies with good posts.

[Big T]

Also, look in "Parts for Sale" and post in "Parts Wanted" here

Lots of members have spare carb parts

Judging by the ham handed approach on the carbs, I'd be looking very closely at everything on the bike while you wait for the carbs to arrive

[NaeKid]

I stopped in at TJ's Cycle and looked through their CarbShack (building with about a thousand carbs in various conditions stacked up on shelving) and found about 45 carb-sets to pick from and two GS bikes in the row with the carbs still attached ready for me to take-off. One of the GS bikes was a smaller and the other was a bigger one than mine.

Anyway, I picked one that looked like everything was there, the top and bottom caps were still in place, but, I did notice that butterfly's would not moved easily, but, all the rest of the GS-based carbs there were in the same kind of condition.

Are there any hints I should do with these carbs before I damage them taking them apart? Should I spray everything down first with WD-40 (or similar penetrating oil) and allow it to sit, or, would it be better to just drop it whole into a container of carb-dip to see what happens?

[cowboyup3371]

First off, WD-40 is not a penetrating oil but a water displacement "dryer" for lack of a better word. Use something like PB Blaster if you are trying to free up stuff. Honestly, a good dip of each carb separately should help some of what you are seeing.

Secondly, are you certain those carbs will fit your bike (spacing, port sizes, etc)? Post up a picture here and the real experts (I'm not one of them) can help answer your questions better than me.

[NaeKid]

As requested, here is a picture of the carbs - they look like they are in basically good condition - a little bit of weathering on the caps (I have some pretty chrome ones already that I will use) and like I said, the butterflys don't wanna move easily.

If I have any time tonight after helping a friend with their KLR650 modifications, the carb's will get soaked with PB-Blaster as suggested. I haven't done much for carb-work, so, I am going to rely on you guys-n-gals and what I watched about the carbs on YouTube videos ... and then pray I do a good job of it.

[Nessism]

Carb rebuild tutorial is linked in my signature.

Those "new" carbs look pretty corroded. I'd compare the condition to your existing carbs and piece together the best parts from both to make one set.

Be sure to look close at the various carb jet sizes and compare to the specs in the factory Suzuki service manual. Assuming your bike is stock you want stock jet numbers where ever possible.

Good luck

[GateKeeper]

Might I suggest this link as well

http://members.dslextreme.com/users/bikecliff/images/how_to_post_pictures.pdf

it will give you instructions on how to post pictures on the site here, larger ones at that, and a good setting for pics for sites is about 800X600, make that setting on PB and in your account settings.

[NaeKid]

Carb rebuild tutorial is linked in my signature.

Those "new" carbs look pretty corroded. I'd compare the condition to your existing carbs and piece together the best parts from both to make one set.

Be sure to look close at the various carb jet sizes and compare to the specs in the factory Suzuki service manual. Assuming your bike is stock you want stock jet numbers where ever possible.

Good luck

I have your tutorial already saved in my documents folder and I have another two GS documents saved as well. I have read over all of them several times over now, so, I have the basic theory down, the theory just needs a little practicle knowledge applied to it.

As far as the rusting and such goes, I was planning to use my buffing wheels to polish it all up till it glows like fresh chrome.

Might I suggest this link as well

http://members.dslextreme.com/users/bikecliff/images/how_to_post_pictures.pdf

it will give you instructions on how to post pictures on the site here, larger ones at that, and a good setting for pics for sites is about 800X600, make that setting on PB and in your account settings.

I am just working within the limitations put on us here on the forum by the administration. I run a few vBulletin forums as well (and planning on building up another one here shortly), so, I know how to do things like that. If you like, I can send you a PM with a link to the forums - none of which are motorcycle based, but, there is always motorcycle talk going on.

The one thing that I try to encourage the members of my sites to do is to have my systems host the graphic-files instead of an outside source. The outside source (like PhotoBucket and others) can easily have broken links, especially if you forget about that account and it closes down - then the forum will no longer be able to show the pictures and then the member will need to relocate the files and re-upload them to make them visible again. Sometimes the member will have lost the original pictures (computer crash), so, the details required for that particular posting are no longer valid.