From Motocross which many choose to participate in it as a hobby, with a small percentage of  them going on to race professionally, to Super-Motards which are motocross bikes with a  different set up and slick tyres. The circuits are half tar and half motocross style, and Pit-Bikes, which are mini MX bikes for both kids and adults alike.
They are an extremely popular form of  hobby riding. Great fun and quite an easy type of bike to train on