Riders who reach the age of 21, while still within the two year period where they are restricted to maximum 25 kW machines, but who wish to ride larger bikes need to pass a further test on a motorcycle of at least 35 kW. They may practice on bikes over 25 kW under the same practice conditions for direct access riders. You will revert to learner status while practicing (on a motorcycle greater than 25 kW) although test failure will not affect your existing licence.