I’ve been trying to find out the bhp of my ’38 600 Flyer the engine No. starts DPY, I ask because I need to take my test, I have read that it could be 32bhp 25kw which is where the level of licence required changes.
I don’t have figures to hand but you would be optimistic if a standard DPY with 60 years use puts out 25kW. I guess you are doing the A2 (restricted) licence so it is only restricted for 2 years anyway. my wife did hers recently and the best advice we got is that if you are not sure then go and get that particular bike run on a calibrated rolling road then you have paper proof that bike is within the 25kW limit.
Had my 1923 two speeder on the dyno last year. This bike should have about 16-17 BHP according to Technicalities etc.
It pumped out a staggering 10,3 at the rear wheel… So I think you might be pretty safe too 😉