Motorcycle Tachometer help

deaurgtehne:
What?! where do you want to mount the reed-switch?

I am mounting it on my shock, and I have a magnet expoxy'ed into my break disc caliper... I suppose you guys all ride superbikes where that makes a difference... (me : XR650L, KTM950SE)

You do know the difference between a tachometer and a speedometer, right?