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Discussion Starter · #1 ·
GS850G - 1983 - - 500,000 on the clock, still standard, opened twice in 26 years ;-) 'O' Rings are a pain !!!
BUT Carb set up is frustrating.- - - Changing the fuel mixture on Nr 1 makes NO difference to idles speed or running at all. Recently it has decided to be inconsistent Idling very slow, or high, or cutting out after a 20 km run.
Any ideas are welcome !!! As long as they don't involve dismounting the carbs - - that air cleaner is a PAIN
 

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Discussion Starter · #2 ·
GS850G - 1983 - - 500,000 on the clock, still standard, opened twice in 26 years ;-) 'O' Rings are a pain !!!
BUT Carb set up is frustrating.- - - Changing the fuel mixture on Nr 1 makes NO difference to idles speed or running at all. Recently it has decided to be inconsistent Idling very slow, or high, or cutting out after a 20 km run.
Any ideas are welcome !!! As long as they don't involve dismounting the carbs - - that air cleaner is a PAIN
Progress Report = BS32 SS carbs [x4] = Idle / Fuel mixture screw removed PLUS spring, washer, 'O' ring, Compressed air blow out and readjust ALL mixture screws. Nr 1 still does not affect idling, so just set it to the same as the others that DO affect the idling.. Running smoother. But it makes me wonder how or where the suspected "grit" is getting into the idle channels.
 

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Welcome to a great forum!

I see no one has answered you-----probably because a bike with that many miles is probably completely worn out and why put the effort into it. That may sound elitist and I don't mean it to be that way but if you clearly love that Scoot so much then just take it to a Suzuki Dealership and let them fix the carbs as this is something they do ALL THE TIME.

At this point, here is what I'd do: Run a can of CHEVRON, TECHRON or similar Carb/ Fuel injection cleaner through the tank, after you change the spark plugs and clean or replace the air and fuel filter. This has worked miracles for me and within 50 to 100 miles, my Suzuki 1200S Bandit ran like new.

Sam:)

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Discussion Starter · #4 ·
Welcome to a great forum!

I see no one has answered you-----probably because a bike with that many miles is probably completely worn out and why put the effort into it. That may sound elitist and I don't mean it to be that way but if you clearly love that Scoot so much then just take it to a Suzuki Dealership and let them fix the carbs as this is something they do ALL THE TIME.

At this point, here is what I'd do: Run a can of CHEVRON, TECHRON or similar Carb/ Fuel injection cleaner through the tank, after you change the spark plugs and clean or replace the air and fuel filter. This has worked miracles for me and within 50 to 100 miles, my Suzuki 1200S Bandit ran like new.

Sam:)

View attachment 71216
Thanks. Maybe it was my mention of "across the pond" that rattled the rear wheel ;-) When I had it open, EVERYTHING is standard - - bore, rings, etc. Just an accumulation of carbon from the leaded fuel days. Electrics need lots of TLC, as they SUCK, according to agents and private specialists who specialize in "fixing" them The BIG downfall of that era of Suzukis.
I have had it for 27 years now and, apart from typical "old age" niggles, it starts and goes, and keeps going as long as their is fuel getting through. Local Suzuki agents say what you say "Is it worth the hassle and money ? Why not buy a new bike ?" The difference between Four hundred and twelve thousand !!! I will go for the ZERO cost garage - at home ;-)
Old and Faithful and it keeps running. None of this niggly "modern electronic-injection-ignition" stuff. ;-)
Ride safe !!!
 

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I'd hate to see your cam chain tensioner, they are utterly dead on every engine I've ever opened up at 100K. Here in Texas the heat kills them in 50K miles, there will be cracks all over them and often pieces missing. You must be in a cooler climate.
 

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I owned a 80 and 81 gs850g, great bike, have you bench sync your carbs?? I would take them apart and soak the jets and all removable parts in WHITE vinegar. It may take 24-48 hours of soaking. Don't forget the emulsion tube under the main jet, after you soaked them in the vinegar use a small sewing needle to clean all the small holes. When you put the tubes back in line them up with the small notch on the top, if any are cracked they should be replaced. Check the diaphragm on the top end of carbs for holes. Take the diaphragm tubes out and see where your needles valves are set, you will need a pair of long nose angle pliers to remove the circlips inside the tubes, they should be in the middle ring if the carbs are stock. Bench sync- once carbs are back together hold them up to a light with the engine side of the carb facing you. I believe #3 is the factory set carb. While looking at the carbs with a light background you will see a SMALL bit of light on the bottom of the butterfly on number 3. Adjust the other three to that same size light. Install the carbs and make your final adjustnents. Sync the carbs using your vacuum gauge or mercury gauge, which ever you use. Your bike should run well after that. When you reassemble the jets, don't crank down on them, just snug them up. This sounds like a lot of work, but once you do it you be amazed at how easy it is. Also, check your manual for the proper jet size. If you don't have a manual I would get one, they are about 95% accurate. Good luck!
 

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Discussion Starter · #8 ·
Wow! A GS850 with 500,000 km on the clock! That's something like 310,685.596 miles.
Impressive. It should be in a museum or something.

S F
NO WAYS. She still runs well, economically and smoothly. Takes me where I want to go cheaper than a car. No traffic problems, no parking problems. It would be a crime to lock her up in "a Museum or something" But thanks for the thought.
The 80s were amongst the most bullet proof engines Suzuki ever made. Electrics SUCK, but work ;-)
Old man River Just keeps rolling along !!!
 

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Discussion Starter · #9 ·
I'd hate to see your cam chain tensioner, they are utterly dead on every engine I've ever opened up at 100K. Here in Texas the heat kills them in 50K miles, there will be cracks all over them and often pieces missing. You must be in a cooler climate.
Had her open 3 times, 'O' rings - and the cam chain tensioner and "plastic / nylon" rail has a few scratches but nothing to write home about. First opening was New Cam chain - the old one was shouting loudly - a month after I bought her ['93]. Since then - 'O' ring on cylinder head '03; leaking head gasket '05'; new rings and cylinder clean up - still standard: ['08] and, finally, 3 'O' rings in the gear box - brittle and cracked ['19].
Longest ride to date = 8000 kms round trip, and the fuel consumption improved the further and longer I rode.
Age is the only problem, but 'running' spares are still reasonably easy to get - - they were and still are VERY popular over here - - 850 + 1000.
 
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