Ok I just found this last night. If you press both buttons on the guage and hold down, the tach lights up and gives you a reading of about 14.5 k rpms a yellow light also lights up on the upper left part of the guage, if you hit the lower button you can adjust this up and down. What does it do?

 

I think that just adjusts at what point the shift light comes on.

 

Correct.

 

Damn, and I thought I found this super secret extra power adjustment lol

 

LMAO... good stuff Jay, i can always use a good laugh!

 

I thought that is where you adjusted your powerband to kick in...the yellow light just warns you to hold on....at least that is the way it works on mine