This class of motorcycle requires a MNZ Homologation, with a minimum of 30 units sold of that mass produced motorcycle. This homologated motorcycle must be a street type, road registerable, available and originally sold new in New Zealand. Only minor modifications are permitted with the aim of the class to keep machines on parity for close racing. Machines can be twin cylinder four stroke engines from 260cc up to 325 cc or single cylinder four stroke engines from 260cc to 380cc.
Current machines predominantly in use are KTM 375cc singles, Kawasaki 300cc and Yamaha 325cc parallel twins.