[camaroguy72]

Can I adjust the stock shock on a 95 zx6r to be stiffer? I weigh 270 and the bike sinks down quite a ways when I sit on it!

 

[spartan 116]

could adjust the preload or compression or get ohlins internals put in (expensive tho)

 

[camaroguy72]

how do i adjust the preload and compression?

 

[dj dunzie]

Did you get a manual?

If not - read this article. It's an excellent overview, and should help you get going in the right direction. I've linked you to the intro page which also has some settings SR has provided as a starting point, but keep in mind likely for an advanced rider and likely not around your weight. My advice is small change, test, analyze, small change, test, analyze...