MNZ Homologation is not required for the 125 Grand Prix/250 Mono class. Junior riders aged 13 years and over plus may compete, provided they have the required MNZ clearances and approvals. The majority of machines racing in New Zealand are Honda RS125cc motorcycles. Machine specs for this class are:
• Up to 125cc, single cylinder 2-stroke with a maximum 6 speed gearbox
• 200-250cc, single cylinder 4- stroke engine with a maximum of a 6 speed gearbox