GS650G Carb upgrade

[darkbane]

Hello All,

As always, I come here, because you guys (gals) have all of the answers.

I know a descent amount about motorcycles, but when it comes to carbs, I'm lost.

I'm looking into getting new carburetors for my '83 gs650g. Besides stock, is there certain models I should look for that I could get more performance out of. I like the look of the flatslides, but I don't know which models would fit my bike.

I'd appreciate any suggesitons, or comments.

Thanks

[Nessism]

Since you asked...my suggestion is to use the stock carbs. The GS650 is a hot little ride, 72 hp, and there is very little to gain by changing the carbs. The only thing you are sure to accomplish by changing the carbs is lightening your wallet and wasting a ton of time sorting out jetting.

Good luck.

[Steve]

How stock is your 650?

Do you already have pod filters on it?

Do you have a header on it?

Do you have a big-bore kit on it?

Do you have hotter cams in it?

Until you have all of those installed, you will not see any improvement by installing other carbs.
As Nessism suggested, keep them stock, but jet them properly.


.

[Dave8338]

How stock is your 650?

Do you already have pod filters on it?

Do you have a header on it?

Do you have a big-bore kit on it?

Do you have hotter cams in it?

Until you have all of those installed, you will not see any improvement by installing other carbs.
As Nessism suggested, keep them stock, but jet them properly.


.

...times three.... unless you are going to mod the pi$$ out of it, leave it alone. IMHO

[tconroy]

check your valves, clean your carbs and replace all o-rings and then sync.That's all you need to do.It made a day & night difference on my 650.Keep it stock too!!!!

[rkubik]

clips 'n grooves

Yours (like mine) is of an age when the jet needle position can be tuned by moving a little metal clip up or down into one of the five grooves on the needle. That tunes your mid-range mixture: clip up=needle down=leaner mixture, and vice versa.

WARNING: do the actual clip moving in a place where that tiny little dark-coloured clip won't get lost, like on the ground, over a large white cloth. You know how I found THAT out!

Your stock main jet size is 110. If it won't pull strongly at high revs, you may need to look at the plugs to see if the main jets need to be smaller (leaner) or larger (richer). One size at a time.

[themess]

A properly tuned GS650G with stock carburetors, air box and exhaust, has essentially perfect carburetion. It can pull wheelies with throttle alone up to about 35 mph, and get almost 60 mpg. The zen is sitting in front of you; respect it.

[darkbane]

* Brand Spanking New K&N Pods
* 4 into 1 Exhaust...I scrapped the muffler, but working on a different solution for some back pressure (pics available) (comments & suggestions welcome)
* I will be wrapping the exhaust all the way down
* I was thinking about upgrading the coils to Dyna and getting new plug wires
* I have no intention on doing any sort of Bore Kit
* I don't know anything about changing cams, so I won't touch that

I don't plan on digging into the engine at all. If I wanted a drag bike, I know to shop around for a different bike. I'd just like to know what my options are for upgrading what I can to make my cafe as quick and responsive as can be within my limits.

On another note. I'm not a big fan of paying somebody to do motorcycle work unless I have to. I do like the challenge of figuring it out myself, but carbs scare the crap out of me because they are very precise. I was thinking of buying a spare set of carbs online and digging into those and playing around before I mess with mine.

Does anybody know of a good resource or specific book I should check out that would help me with my challenge of learning about carbs?

Thanks to all for your comments.

[tconroy]

A properly tuned GS650G with stock carburetors, air box and exhaust, has essentially perfect carburetion. It can pull wheelies with throttle alone up to about 35 mph, and get almost 60 mpg. The zen is sitting in front of you; respect it.

I get 58 mpg.and can get the wheel off the ground in 3rd gear and can reach 110mph going thru the gears.What more could you want out of a small inline 4??? Get it tuned perfect and hold on!!!!

[Nessism]

You are going to have to rejet with your changes to the intake and exhaust. Not sure of Dynojet makes a kit but I'd go that way if they do.