Join Date: May 2006
Location: West Ossipee, NH
Just checked mine after all these years. I found I have about a 5 mph variance up to about 50, then about 7 mph when doing 55.
VTX 20 mph - actual 15mph
VTX 40mph - actual 35 mph
VTX 62 mph - actual 55 mph
I did this with my car and GPS. My daughter ended up behind me in her car one day and called home to my wife to say she caught up to me and for some reason I was going really slow. She knows I usually ride speed limit or a bit faster. This made me check cause at low speeds it was more than 10% off.
Just my $.02 worth.
2004 VTX1300C ... well not a factory C any longer.