http://www.nzta.govt.nz/resources/ru...t-2011-qa.html
point 2,
2. Introduction of a power-to-weight limit for learner and restricted riders
What restrictions are there on the types of motorcycles that novice riders can ride, and why?
Currently, holders of learner and restricted motorcycle licences are restricted to riding motorcycles of 250cc and less. However, advances in technology are limiting the effectiveness of the restriction. A number of powerful high-performance 250cc motorcycles capable of high speeds and rapid acceleration are available on the market. These motorcycles are not suitable for novice riders due to their power, riding position and handling. Advances in motorcycle power are likely to continue.
Most Australian states have recognised the 250cc novice rider restriction as a safety issue and have replaced this with the proposed power-to-weight/cc restriction through the introduction of a Learner Approved Motorcycle Scheme (LAMS). This has included a list of motorcycles that are LAMS-compliant, which has been researched thoroughly. LAMS has proved popular with the Australian motorcycling community, and could readily be adapted for use in New Zealand.
What is the power-to-weight ratio for learner and restricted riders?
Novice riders will be prohibited from riding the following:
a motorcycle over 660 cc;
a motorcycle with an engine capacity of between 251cc and 660 cc and a power-to-weight ratio of less than 150 kilowatts per tonne, unless the motorcycle is approved by notice on the NZTA's website;
a motorcycle with an engine capacity of between 251cc and 660 cc and a power-to-weight ratio of more than 150 kilowatts per tonne;
a motorcycle with an engine capacity of 250 cc or less, if prohibited by the NZTA by notice on the NZTA's website.
This means novice riders will be entitled to ride the following:
a motorcycle with an engine capacity of between 251 cc and 660 cc and a power-to-weight ratio of less than 150 kilowatts per tonne, only if the motorcycle is approved by notice on the NZTA's website;
a motorcycle with an engine capacity of 250 cc or less, unless prohibited by notice on the NZTA's website.
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