Any easy way to adjust the front to rear brake bias in the Z? I've seen adjustments and proportioning vavles on other cars before (higher end, usually race built) but wasn't sure of the internals and how complicated it was. Any suggestions? I'm more a driver than a mechanic.

I don't think it uses nearly enough of it's rear brakes.

 

The Z has electronic brake force distribution as part of the ABS system, you can't over ride it to my knowledge.