1979 GS850GT jet question!

[GS850]

hi!

i recently started rebuilding a '79 gs850 and after installing K&N airfilters it quick became obvious i will need to change the fueljets in the carbs...

does anyone have an idea what the standard fueljet size is for the '79 and which type would i need to get it to run again!

someone's coming over to help me synchronise the carbs but i need the jets first...

thx!!

[Steve]

First of all,


Next item: the 1979 model is indicated by an "N" after the G, not a "T".

Next item: if it is, indeed, a '79, it will have the VM-series carbs. Stock main jets on them is 102.5.
If you are, by chance, talking about an '80 model that was made in '79, it would have the BS-series carbs, stock mains on those are 115.

We need to know which type of carbs you have and whether you have stock exhaust or an aftermarket pipe before recommending a starting point for your jetting "fun".

.

[7981GS]

Also, what altitudes do you normally run through?

Daniel

[850 Combat]

If it doesn't have a kick starter, it isn't a 1979. If it isn't a 1979, you are pretty darned sure to need a jet kit with aftermarket needles if you want it to run correctly without an airbox.

Dynojet is one of the manufacturers. There are numerous threads in this forem about this.

[Big T]

Clear up the confusion on what year your bike is

Also, a K&N drop in shouldn't make that much difference

You carb specs are in the sticky above and in the factory manual available off BassCliff's site

[BassCliff]

Greetings and Salutations!!

Hi Mr. GS850,

As you can see, we don't quite have enough information to provide the proper advice.

1) Year model: The 1979 has a kickstart and VM carbs. The '80 and later has no kickstarter and CV carbs.

2) K&N air filters: Do you have 4 individual pod filters, or did you put a stock replacement K&N air filter in the stock airbox?

Depending on the maintenance history of the bike, it could need a lot more, or a lot less, work than you have planned. See the links below for the maintenance lists of things to check, clean, repair, replace, inspect, etc.

Anyway, let me dump a TON if information on you and share some GS850G lovin'.

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

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!"....

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. Now let me roll out the welcome mat for you...



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!

Thanks for joining us. Keep us informed.

Thank you for your indulgence,

BassCliff