how much do i adjust the fork settings

[bigsean]

is there a formula for height and weight?

[md86]

Probably , but the Kat forks aren't very adjustable .

[The CyberPoet]

The OEM forks only have a damping adjustment (3 position for the pre-98, 4 position for the 98+). Aside from that, you get replacement springs and/or use heavier oil in the forks to adjust for weight. I carry replacement Ohlin springs that are about 25-40% stiffer than the OEM springs; depending on your weight and riding conditions, these may suit you well. If you clock in at or above 300 lbs, seek the RaceTech 1.05 rate springs instead.

Cheers,
=-= The CyberPoet