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best fuel to run?

  • Thread starter Thread starter zuki4life
  • Start date Start date
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zuki4life

Guest
Im a 18 year old kid and the GS fever has got me. I just found a 79 gs850g with a windjammer farring and lowers with radio for $ 450. I have two questions. first off, whats the model of carbs that weigh about twice as much as the other ones, that dont have a diaphram sliderdohickey. Also I have heard of people running 100 octane in their bikes, went to autozone and bought 104 does anybody use that fuel? this bike has not been ridden in a year I am in the proccess of completely restoring it about 95% done! Ill upload pics if I can figure how to.:D
 
Dont quote me, but i think the manuals basically state 90 octain as a minimum. I have been running regular 87 and dont have any problems.
 
GS bikes like yours run on REGULAR fuel. There is no benefit in running anything different.

Your bike has Mikuni VM26 carbs. Cast from zinc.

BTW, you might want to check the Newbie Mistake thread linked in my signature to help avoid future problems.
 
Go to any NEW OWNER thread and click on Basscliffs MEGA WELCOME and do and follow ALL the things in the maintenance sections.

Do it ALL right the first time and then its just a matter of the periodical adjustments and lots of enjoyable ricing.

I am sure he will be along here to post a welcome package. read it all and then be sure they are all done.

EDIT...I thought it said 80 and posted...Ed is right. The fiche shows VMs. I stand corrected.

Do yours look like these???

http://www.bikebandit.com/1979-suzuki-gs850g/o/m12821#sch256970
 
Last edited:
See above post...I thought it said 80...once Ed posted I had to go back and reread the original post and amended it appropriately.
 
The rubbethingydohicky stuff threw me off = rubber slide thingys means an 80 or older 850.
 
Greetings and Salutations!!

Greetings and Salutations!!

Hi Mr.

These old low compression engines run just fine on regular gas. Don't waste your money. See the links below for lots of GS850G lovin'. Please follow the maintenance lists for a happy motorcycle.

If you are here you probably have a 30 year old motorcycle that needs about 20 years worth of maintenance. You'll find all kinds of helpful tips, procedures, manuals, diagrams, "how-to" guides, etc, in the links below. Let's get started.

Let me dump a TON of information on you and share some GS lovin'. :D

I just stopped by to welcome you to the forum in my own, special way.
big_hi.gif


If there's anything you'd like to know about the Suzuki GS model bikes, and most others actually, you've come to the right place. There's a lot of knowledge and experience here in the community. Come on in and let me say "HOoooowwwDY!"....
hat1.gif


Here is your very own magical, mystical, mythical, mind-expanding "mega-welcome". Please take notice of the "Top 10 Common Issues", "Top 15 Tips For GS Happiness", the Carb Cleanup Series, and the Stator Papers. All of these tasks must be addressed in order to have a safe, reliable machine. This is what NOT to do: Top 10 Newbie Mistakes. Now let me roll out the welcome mat for you...

carpet.jpg


Please Click Here For Your Mega-Welcome, chock full of tips, suggestions, links to vendors, and other information. Then feel free to visit my little BikeCliff website where I've been collecting the wisdom of this generous community. Don't forget, we like pictures! Not you, your bike! :D

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff
 
Lots of people really like the 1979 because it has a kickstart and points. 1979 does not have CV carbs, it has slide carbs. 1980 and on have CV and electronic ignition, and no kickstart.They are very good machines, and do most things pretty well, and in comfort, as long as it isn't an L.

How about some photos?
 
850 Combat said:
They are very good machines, and do most things pretty well, and in comfort, as long as it isn't an L.

How about some photos?
Click to expand...
Agreed, on most points. :o

My wife's L happens to fit her and makes it MORE comfortable for her. :p

Since zuki4life's bike is a '79, it won't be an L. :D
(Unless it's an '80, made in the last few months of '79, but then it would have "diaphragm carbs".

.
 
thanks guys for answering my questions, Yeah those are my carbs chuck hahn. My frame says 78' I'm thinking it was made then to be sold in 79? It has point coil whick I want to upgrade,electronic ignition, and kickstart. Also when I removed the back fairing I found registration from 1984 and the tire pressure gauge! I have cleaned the carbs, had the tank painted, little elbow grease, changed fluids, and only have 850 bucks into it! 23000 miles. Im having alittle trouble figuring out how to upload pics u guys got ant advice:eek:
 
Miost guy use photobucket or similar and then link pics from there. good way to build albums and post pics of rebuilds and such.
 
Nessism said:
GS bikes like yours run on REGULAR fuel. There is no benefit in running anything different.

Your bike has Mikuni VM26 carbs. Cast from zinc.

BTW, you might want to check the Newbie Mistake thread linked in my signature to help avoid future problems.
Click to expand...

nessim i normally agree, but i have a slight disagrement this round...

if i run 93 in my bike, i notice a small increase in power...not much but i notice it...i also ride everyday...i know when my bike has the slightest change..

now on 87 which im running now, it still runs great, and gets roughly 35-36 mpg...on 93..30-32 mpg....

i also have a 4-1 and jetted carbs...

i ran a smidge of 110 in my bike once....i wont do it again...it missed and backfired etc that tank of gas...

so yes just run 87 ...these bikes seem not to care between 87-93....if we go out to play or race i run 93....other then that i run 87
 
gs850cafe said:
nessim i normally agree, but i have a slight disagrement this round...

if i run 93 in my bike, i notice a small increase in power...not much but i notice it...i also ride everyday...i know when my bike has the slightest change..

now on 87 which im running now, it still runs great, and gets roughly 35-36 mpg...on 93..30-32 mpg....

i also have a 4-1 and jetted carbs...

i ran a smidge of 110 in my bike once....i wont do it again...it missed and backfired etc that tank of gas...

so yes just run 87 ...these bikes seem not to care between 87-93....if we go out to play or race i run 93....other then that i run 87
Click to expand...

I don't think it's possible to get more power from 93 unless you advance the timing. As for the mileage, I don't think you should get worse mileage with 93 either. Something doesn't sound right. The only noteworthy difference you should see is less tendency to detonate. The compression ratio is low enough on your bike to not have this problem, except maybe in really hot conditions.
 
Most of these bikes require 87....but some of the 77-78's state to use a minimum of 90 octane(unless the manual printed was using different european gas grades, i don't know)

I do use 93 octane in my 750 though, because the previous owner rebuilt the motor, advanced the cams, and I'd rather not take a chance.
100LL runs fine as well, but I won't go there.
 
I'll stick to pump gas, Bass Cliff ill look into your websit I have read some of your carb links and they were extremely helpful.
 
what petrol ????

what petrol ????

hi guys i,m in australia ,,, in both my bikes i only use 98% unleaded ..it doesn,t go off at all ,, i also run my falcon on 98% unleaded as well .. regards oldgrumpy :D:D:D
 
Here's a picture of the needle jet before cleaning I'd say its a little dirty.
 
I wished I had pics of the bike when I first bought it the ignition was locked and we fixed it.
 
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