Although well established in the aviation community, low-cost and vehicle independent "black-box" technology for accident analysis, adapted to mass-market ground-based vehicles, is an emerging technology with growing importance. Whilst several produits suited for cars are available on the market, almost no devices adapted for motorcycles exist. Due mainly to their particular dynamics and lack of space for installing any external device, the design of a data-recorder technology for motorcycles is nontrival. This becomes even more challenging if the technology has to be independent of the motorcycle type, low-cost, easy and fast to mount, and not based on GNSS technology (for autonomy and privacy issues).