1981 GS850G Power Curve

[doctorgonzo]

No leaks. New intake boots and o-rings. , new air box connectors also. Carbs have been rebuilt and fuel o-rings installed, sync is good, valves are close.
Stock air filter and -8 NKG plugs.
I should pay myself for all the hours I have spent on carburetting... what a learning experience.

I'm lucky (and no I don't work for them), I put a dynajet stage 3 kit in after going to individual K&N filters (stock exhaust) and it nailed it. Ran perfect with no adjustment. The plugs are a bit sooty, but this has been traced to weak spark from crappy old stock coils and cracked wires. The 3 ohm dynatek coils on the way should take care of that.

[Dogma]

On my ’82 there is a lean spot in the carburetion at partial throttle – about 1/3 throttle opening. When the bike is cold the lean jetting is more noticeable but as the bike warms up it runs pretty darn well. I’m going to try shimming the needles a smidge to see how this affects things, but the bike doesn’t need drastic action or anything and I hate to give up mpg with gas prices the way they are.

One interesting thing about the 850 is that Suzuki changed the cam timing and added an exhaust cross-over chamber in order to improve midrange power. Not sure what year these changes were introduced, 1980 or 1981, at the same time they switched to CV carbs I think. If someone had an early bike it would be interesting to try the later cams so see if they really make a difference.

Interesting. My '80 has the mounts for the crossover, but it's not there. The screws are even bottomed out in the pan, holding nothing. I've been hearing about this crossover, but I totally don't get how it helps when only two cylinders are affected. Or is it only those two that get the boost? BikeBandit's fiche called it a pre-muffler.

[DonL]

I have the GS1000G and yes, it doesn't even really start to pull until about 6000. It runs fine below, but you know when you start to hit the sweet spot! I live for chances (few though they may be outside a drag strip) to run it up to about 8000 before shift and take it through the gearbox.

Found this in my "box" of magazines and scanned it in.
It is the 1979 CycleWorld specs of Suzuki GS850G.
Hopefully I can actually upload it for you all to see.

If you can't read it, email me and I'll send you a copy of the jpg.

Hope this helps!