125 Grand Prix /250 Mono
This class of motorcycle requires no MNZ Homologation. Junior competitors aged 13 year plus may participate in the 125cc GP class or the 250 GP Mono class provided they have the necessary MNZ clearances and approvals to do so. 125cc GP Machines must be up to 125cc single cylinder 2 stroke with a maximum of a 6 speed gearbox, or 250cc GP Mono machines be fitted with a single cylinder four stroke engine with a maximum of a 6 speed gearbox, with a capacity no less than 200cc and no greater than 250cc.
The majority of machines racing in New Zealand are Honda RS125 cc machines.