new sprockets and chain?

I've got an 83 kz550, was wondering if anyone could suggest a sprocket and chain set up. should I stay with the stock tooth count? or go with a different size.

First off, welcome to KZr rotorhead.

It all depends on what you're wanting to achieve:

A front sprocket with a higher tooth count (or rear sprocket with a smaller tooth count) will give you a higher top speed and better fuel mileage if driven smoothly. But your bikes acceleration may suffer slightly, since it will take more time to reach that top speed.

A front sprocket with a smaller tooth count (or rear sprocket with a higher tooth count) will give you faster acceleration, but you won't have as high of a top speed and your fuel mileage will suffer.

So I'd suggest basing the change on what type of riding you mainly do. You'll also want to factor in any gear (plus weight of rider, and passenger if any) that you'll be carrying with you, as that will also effect performance.

The best way to do it is one tooth size change at a time, that way you won't be to dissapointed if the results are more/less than you had expected.
You'd be surprised at how much just one tooth size diff will make in how your bike performs.

Hey Rotorhead,
You'll be surprised at how well the stock setup works. Change if you have a real need but if your gonna use the bike for regular street riding Ma Kaw knows best.
KZCSI

Hey guys thanks for the welcome and the info. I'm in the middle of fixing it up. its in pieces in my kitchen. My first bike. I was happy with the way it ran. The top end was not too impressive but but it ran pretty well. figured I'd fix it up over winter, new tires, new fork seals, paint job, that sort of stuff.
Lots of questions.