The pickup is a magnetic sensor used by the cdi to sense the position of the crank and uses that information to make the ignition spark in the exact time/moment, I just want to buffer this signal and clean it up to connect it to the arduino.
The bike will be an 125cc 2 stroke, or some 50cc to 100cc 2 stroke racing engines, I think I already have some good code to do this, tomorrow I will post it here and I will test it next week in my university labs.
Attaching one hall sensor and a magnet to one wheel would make a very nice speedometer.