Hmm, I am using an inductive tachometer and used the idle speed as my reference rpm for setup. I know the spec for the idling Rev is around 1800rpm. And the clutch will start to engage at this rpm as well. dividing or multiplying 1800 by 2 will give me impossible idle rpm.
The max rpm I have seen on my bike was around 8500rpm. Btw, what tachometer are you using? I can see from your pics that you are also using a inductive type, picking up signal from the plug wire. It can be very prone to interference from the other wires, such as the lightings and signaling. It can give you false readings if you run the tachometer sense wire too close to them.