The installation of the magnet and sensor was made easy with the EBC oversized rotor. The magnet w/ retaining clip fit into one of the rotor slots and the sensor was easily fitted onto the EBC caliper extender bracket. I took the easy way with the RPM installation by simply wrapping the RED wire around the spark plug wire. The water temperature sensor was also easy to insert into the left side horizontal water line. Didn't even have to drain the radiators. This hose connects to the top of the radiator. I elevated the front end and caught a little coolant in a container. Took the XR out this morning and everything worked. I'm running 15/48 gearing which a gearing calculator says has a top speed of 93 mph. I saw 92 on the Vapor. BTW, the tires are Avon Gripsters. 80/20 (road/dirt).