It's a good assumption that the track you've driven on has the necessary magnetic strip embedded into the asphalt that's used for GPS and lap time tracking. The Kaaz Race Monitor uses the magnetic strip to enable the GPS and lap sensor to work in harmony while leaving you with the luxury of not needing to adjust speed and rpm. The lap sensor was securely mounted to the undercarriage using 3M tape and a flat contact surface, which in this case was the Evo's carbing side brace. If for some reason the road course you plan to race on doesn't have the magnetic strip, the Race Monitor will require you to manually calibrate speed and rpm. Using the directions on the screen, calibrate the engine rpm by pressing the "Select" button. Press the "Set" button when you have successfully stabilized the engine rotation to a specified 3,000 rpm before exiting out the menu. Your speed must also be calibrated when the vehicle hits 40 kmh.