You could pass on a bike above a 125 and ride a restricted big bike or a bike like the Honda Bros 400 which is just below the 25kw max power rating of the restriction.
My brother is in a similar position and he did the full test, first time he took his bros out he came back with a grin a chesire cat would be proud of.
Details on on restrictions and test are on this page
Motorcycles you can ride : Directgov - Motoring
Welcome to forum and have fun no matterwhat you decide to do.
