When do suspension settings change?

[rybo]

You have a base setting and you work from there. Too many variables as mentioned from bike to bike and rider to rider to give a standard answer.

Agree,

and I keep a log.

Date
Temperature (air/track)
conditions (sunny, overcast, rain)
Tire
Tire condition
Tire pressure

I've been racing for a little more than 10 years now, so I have some of my stuff pretty well sorted. Ultimately I'm not usually making changes much beyond a couple clicks one way or another.

The spring is the most important part. If it's wrong there is simply no change you can make with the rest of the clickers that will make up for it. Once that's right it's really trial and error since every rider likes a little different "feel".

At the extremely pointy end - the suspension settings for Jorge Lorenzo simply DO NOT WORK for Valentino Rossi, even though they are both world class riders on nearly identical machines with the same tires.