LuLz! Yes, the Z's ECU does loooooze what gear its in when u go to a lower Final Drive (FD). It usually happens when u rip thru the gears. It will come back though and stay if u drive like an old man. SRM will not work of coarse. Don't UPREV offer a table where u can select what FD u have installed on the Z so SRM works properly?
I would hope a 4.08 FD Z would whoop a 3.69 FD Z from a 40mph roll race if u both start out in 2nd. WTF would start out in 4th going 40mph!