The official DSA’s pdf guide to motorcycle licences:
Routes To Your Motorcycle Licence
16Yrs+ (AM) Moped Licence
Once the test has been passed you obtain a restricted licence only allowing
you to ride up to a 50cc moped.
L plates must be displayed*
*Those who passed a driving test before 1st February 2001 already hold this licence. You can
ride without L plates and carry passengers.
17Yrs+ (A1) Light Bike Licence
You take your tests on a 125cc motorcycle.
Once the test has been passed, you obtain a restricted licence to ride a
125cc motorcycle only.
You can ride without L plates, carry passengers and use motorways.
This licence does not upgrade.
If you wish to ride larger motorcycles then you can do one of the
below:
a) Wait 2 years on the A1 licence then re-take Module 1 and 2 for the A2
licence.
b) Wait until you are 19 - if this is short of 2 years of holding the A1 licence
you must retake a theory test and sit Module 1 and 2 again for the A2
licence.
c) Wait until you are 24 to sit Module 1 and 2 again for a full category A
motorcycle licence.
19Yrs+ (A2) Middle Bike Licence:
You take your test on an A2 compatible bike. Ours are Suzuki 650cc,
restricted to 47bhp.
Once the test has been passed, you obtain an A2 licence, allowing you to
ride motorcycles of any size, not exceeding 35kW (47bhp).*
You can ride without L plates, carry passengers and use motorways.
*You cannot restrict motorcycles by more than 50% of their original power - i.e. motorcycles that
are originally more than 70kw (94bhp).
You can ride without L plates, carry passengers and use motorways.
In order to ride a larger motorcycle you can do the following:
a) Hold a A2 licence for 2 years and sit MOD1 and MOD2 again on a 600cc
(minimum power of 40kw/54bhp) - this will then be a full Category A licence
(as below)
b) Wait until you are 24yrs old and complete the Mod 1 and Mod 2 tests.
24Yrs+ - Full Unrestricted Category A Licence
If you are 24yrs or over, or held an A2 licence for 2 years, you can take
your tests on a full powered bike. After passing
your tests, you can ride any size motorcycle without restriction.
You can ride without L plates, carry passengers and use motorways.