AM – Mopeds. Continuous power up to 4kW. Max speed 28mph. These are typically regarded as being equivalent to 50cc A1 – Power <= 11kw, Power/Weight <=0.1 kw/kg. These are typically regarded as being equivalent to 125cc A2 – Power <= 35kw, Power/Weight <=0.2 kw/kg A – Power > 35kw, Power/Weight >0.2 kw/kg