The legal definition of a motorcycle for the purposes of registration, taxation and rider licensing in most countries is a powered two-wheel motor vehicle. Most countries distinguish between mopeds up to 49 cc (scooters do not count as a separate category) and the more powerful, larger, vehicles known as motorcycles. Many jurisdictions include some forms of three-wheelers as motorcycles.
In New Zealand, a motorcycle is any two- or three-wheeled motor vehicle weighing less than 1000 kg, that can travel faster than 50 km/h or that has an engine capacity exceeding 50 cc. A moped is a motorcycle-like vehicle with an engine capacity under 50 cc and that cannot exceed 50 km/h.
Motorcycles may only be driven on a motorcycle (class 6) licence; a moped can be driven on a car (class 1) licence. Riders on their learners or restricted motorcycle licence can only ride approved motorcycles on the Learner Approved Motorcycle Scheme list. These motorcycles must have an engine capacity of 660 cc or less and a power-to-weight ratio of 150 kW/tonne or less (when including a 90 kg rider). Motorcycles with an engine capacity of 250 cc or less are automatically approves, except for a small number of high-performance machines. Pre-1960 motorcycles are exempt from the power-to-weight ratio restriction.
The legal age to be eligible to apply for a New Zealand motorcycle licence is 15 years and over. New Zealand employs a three stage system for motor vehicle licensing. At age 15, an individual can gain their first licence known as their "learner licence". They must hold this for at least 6 months before they are able to move on to their "restricted licence". They must then hold this restricted licence for one and half years. After a period of 6–18 months, depending on age and additional training, a holder of a restricted licence may sit the third and final stage known as the "full licence".
A similar system is used in most states of Australia, with some variations. "Learners Permit" and "Provisional" licence holders must not have bikes that exceed a power-to-weight ratio of 150 kW/tonne or 660 cc, whichever comes first. All 250 cc bikes (with a few listed exceptions) are automatically included in this LAMS (Learner Approved Motorcycle Scheme) list.
Before getting a learners permit a pre-learner course is required, which issues a certificate of completion, valid for 3 months. Upon passing a computer test, the rider is granted a learners permit, which is valid for 12 months. Whilst on a learners permit, the rider may not carry a pillion or side car and may not exceed 80 kilometres per hour (50 mph) or the posted speed limit, whichever is lower, in certain jurisdictions.
To progress to a provisional licence, the rider must successfully complete a pre-provisional riders course, followed by a riding skills test called MOST (Motorcycle Operator Skill Test). The rider is then able to obtain a P1 provisional licence enabling a new upper speed limit of 90 kilometres per hour (56 mph) and giving the rider a maximum of four demerit points. These licences can be renewed and must be held without suspension for 12 months, after which time it can be upgraded to a P2 provisional licence, which is then to be held for 2 more years before the rider obtains their full licence, providing they have not breached any laws causing them to be suspended or disqualified in that period. P2 provisional riders have an upper speed limit of 100 kilometres per hour (62 mph) and a maximum of seven demerit points. P2 provisional riders are permitted to carry a pillion, P1 riders are not. There are exceptions to this rule for mature age licence holders who also hold an unrestricted drivers license, who may be eligible to bypass the P2 provisional period.