I recently changed the front sprocket of my '13 DL650 to one tooth less. Of course the speedo was now way out as the speedo is run off the countershaft sprockets on these models. I had a extra bicycle computer so I adapted it to put on the strom. I epoxied a small magnet to the rotor and ran the pickup wire along the brake line to eliminate stress from suspension movement. Easy to program the unit based on your front wheel size for either MPH or KPH. I bought this unit long ago from Aerostich. Came with an extra long wire/pickup for the bicycle rear wheel which is what I used as the one for the front bicycle wheel was too short. Maybe all bicycle computers come with both so you can use either the front or rear bicycle wheel. Anyway checking with my GPS it is spot on. Just have no need for a GPS on my bike full time. Also there are wireless bicycle computers available that could be an option.