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Gs850g

D

Diver

Forum Apprentice
Past Site Supporter
Hi all again.
will a set of Carbs off a 1984 GS850 suit a 1979 GS850G.
Regards
Chris
 
Nope. The '84 carbs are CV type, and your '79 carbs are VM, mechanical slide type. The VM's are smaller diameter, which employ smaller carb boots and smaller head ports.

It may be possible to adapt the larger carb boots onto your head, so you can use the CV carbs, but it's of questionable value.
 
Thanks for your reply. CV Carbs are already on my 1979 GS850G and I can get a set off a 1984 which look the very same.
 
Diver said:
Thanks for your reply. CV Carbs are already on my 1979 GS850G and I can get a set off a 1984 which look the very same.
Click to expand...

Hum. Are you sure your 850 is a 1979 model year? If it was build after July or August 1979, it's most likely a 1980 model year bike. If you have an electronic ignition, what will be addition information suggesting it's a 1980.

Anyway, those '84 carbs should be fine.
 
It is Registered 1979. It had points, however, I installed electronic ignition to it. I can't find any reference numbers on them.

It doesn't have a kick start.
 
No kickstart = It's NOT a 1979 model year bike. No worry, those CV carbs you found will work. I have O-ring kits if you plan to rebuild them.
 
Grimly said:
Very possible it's got a later engine.
Click to expand...

That would explain the CV carbs and lack of a kickstart shaft. But it would have had electronic ignition, not points. That combination did not appear on any model or engine in the U.S. market AFIK. I do not know about Ireland or other markets. .

Perhaps some pictures and provenance would help solve the mystery.
 
Thanks for all that.

Could you please let me have some information on the "0" Rings as I might decide to overhaul them.

The Frame No is 102736.
 
dpep said:
That would explain the CV carbs and lack of a kickstart shaft. But it would have had electronic ignition, not points.
Click to expand...

Depending on the source of the engine. Some breakers strip all the easily removeable bits and just sell the bare lump. Could be that's what happened, and the PO re-used his points set-up.
 
Diver said:
Thanks for all that.

Could you please let me have some information on the "0" Rings as I might decide to overhaul them.

The Frame No is 102736.
Click to expand...

My signature contains links to a carburetor rebuild tutorial, inside of which, you will find a detailed list of the O-ring sizes needed to rebuild a set of Mikuni CV carbs.

My signature also contains a link to how you can purchase an O-ring kit. Buying this way will be cheaper than sourcing the various O-rings in your local market.
 
Don't see any such option there. Is there any other way.

Is there any way I can identify the year from the Engine and Frame Numbers.

Apologies for being such a nuisance.
 
You said it doesn’t have a kickstart. That’s the definitive answer. GS 850 had a Kickstarter up to and including 1979 models. No kickstarter= 1980 and up models.

As for the signatures: Creating one, showing it, and being able to view others’, Go to the top of any page, pull down the arrow next to your username. Go to UserSettings, then the Account Tab. Scroll down and look for the bit about signatures. Make your changes as necessary, and be sure to Save any changes.

​
fH2k3CRh.jpg
 
Just a couple of little details, 1980 changed the turn signals from round to rectangle, also in 80 the turn signal and hi-lo headlight switch was on the "same button", up-down for hi-lo and right to left for R & L turn signals. How is the choke situated? 80 started the choke cable coming out of the steering stem, pre 1980 the choke was a lever on the carbs...At least that's the way I remember it.
 
rphillips said:
How is the choke situated? 80 started the choke cable coming out of the steering stem, pre 1980 the choke was a lever on the carbs...At least that's the way I remember it.
Click to expand...
Both 79 and 80 GS850 had the choke on the steering stem.
Great place for it, in my view. I can easily use a car choke control, or a hood release T-pull in the case of the 79.
 
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