speedomerter

Back with another question for my XS400g cafe racer, I would like to remake my instrument cluster to be slimmer with an Arduino. My question is, whats the ratio for the cables going to the mechanical Tach and Speedo?

I bought a project xs360 a few months ago and the speedometer was included, but not installed on the bike. I'm not sure if it works, or if there is a way to test it(bike is in tear down status). If interested or have any questions about it let me know. Offers welcome.

Problem solved.