The ECU pins on the A8 differ slightly from the A0, which is what is listed on the PC web site.
The PC web site does not list A8 models.
See the attached for the pin differences and what you have to do if you want to install an A8 ECU in a bike with a harness for an A0.
Download and remove the .pdf extension. That is why I did it originally, however it is useful here.
As xracer wrote the PC III intercepts the injection signal and all important ECU pins are the same for the PC III. to function.
This is what needs to be checked on the PC III harness connectors and I expect it is not the case.
If all pins, apart from the N/C not connected that match on each model, "pass through" the PC III harness then you will be OK.
The pins of concern are 15, 16 and 19. I have included another tab in the Excel workbook to show which pins are which.
Test the PC III harness with a multimeter on the resistance scale.
There should be zero resistance between pin 15 into the PC III and pin 15 out of the PC III. Same for 16 and 19.
If the resistance is infinite, then there are not wires in the PC III harness and it will not work with an A8 bike, such as yours as there will be no required connection between your ECU and your bike's harness.
An alternative with more mapping granularity using the full 16 TPS and 16 RPM breakpoints as opposed to 10 TP breakpoints in the PC III is as follows.
Buy the Lonelec cable for GuzziDiag, JPDiag etc. About 25 Pounds Sterling.
Download and donate to GuzziDiag - download IAW 15x Reader and IAW 15x Writer.
Download in the Downloads area and donate to Tunerpro.
The basic version is fine, so you do not need the RT version.
You can the modify your map in Tunerpro then use IAW Writer to flash your A8 ECU.
I have attached the required XDF for the A8 ECU and the bin file that I am using in my bike, which has open airbox, enlarged crossover and DP exhausts.
It still needs a bit more work, but it is better than the DP bin file that came in the ECU.
Just remove the .pdf from each after downloading.