The age group for this class is 13-15 years old. You must be at least 13 years old before you can start to compete here, but as long as you are 15 on January 1st you can continue to compete. At 14 you can get a senior endorsement on your junior license that will enable you to run in both the Juniors and the 125GP / 250GPMono classes. It is worth noting that you can start to practice for the Juniors class at 12yrs and 9 months old.

Juniors wanting to get their first race license must join a club and then do the mandatory 5 hours "Kickstart" program before they can apply for a license. Keep an eye on the MRRDA website for info on "come and try" / rider training days.

The 4 stroke Junior class for 2011 will include the Honda CBR150.

The rules for each of the bikes is that they must remain standard. The engine, chasis, electrics and fuel systems (including air boxes) must remain OEM and unmodified. You may change the handlebars to clip ons providing they are mounted at the same point as the original bars and you may change to rear sets as long as they also mount at the same point as the original pegs. Brake lines may be changed to braided lines. Everything else must remain standard.  Tyre rules are as follows;

Tyres for 150cc Junior 4 as per 2011 GCR 15.10.0.2, that is tyres must:
a) Be commercially available in Australia,
b) Be manufactured for road use in all weather conditions,
c) Be not less than the machine manufacturer’s recommended speed and load rating,
d) Be worn no more than to the minimum tread depth indicators,
e) Not be manufactured for only competition use,
f) Not have an augmented or modified tread pattern,
g) Comply with the service description (load and speed rating) permanently moulded on the OEM tyre side wall,
h) Comply with the relevant requirements of the nominated standard. E.g. ETRTO, JATMA & TRA.
29.4 In all classes, as per 2011 GCR 15.17.0.3 Tyre warmers may be used. Tyre treatment may not be used.

At each race Juniors are judged on their Marketability, Attitude and Character by a panel of judges. These are referred to as "MAC" points. The top 5 will be given 5 points down to 1 point to add to their on track points. In this manner we encourage good behaviour at the track and those that approach the sport in a professional way. This is important if the riders are to go on to make a living from the sport. After the first round, the leader of the series on combined track and MAC points will be given the Red Bull leader's helmet to wear at that round. At the end of the year, the rider with the most combined MAC and track points will be awared the Red Bull prize of a trip to Europe to the final trials of the Red Bull Rookies cup.

 For a full spec on the Honda CBR150 you can download the manual here.