OK Steve here goes! Note:- Some comments relate to just this case so may need deleting before saving Steve
First thing to do is write to Honda UK at:-
Honda (UK)- Motorcycles
470 London Road
Slough
Berkshire
SL38QY
Last phone number i have is 01753590500
You request a "Proof of year of Build" letter and quote the full stamped in frame number---DO NOT add a model number or any other information! Also there is no point in asking for any other info such as engine number or colour as no records were kept!
The cost was about £30 and it may take up to 8 weeks! so DO NOT Yet arrange insurance
In the meantime you need to get the bike to MOT standard and if you have a trailer/van take it for MOT. If not you will need to do this VERY quickly after getting insurance (see later on)
If the bike was imported from outside the EU you will need a document from HMRC stating that all import duties have been payed.
In this particular case you may have a problem as the Customs man will want to know an approximate date of import, place and value at time so you may have to fib and say it came from the EU, I neither condone nor recommend this course of action
Go to the DVLA website and you should find somewhere to request the appropriate forms for registering an import NOTE there are different forms for EU and "Outside EU"
With all your paperwork collected arrange frame number insurance, which most firms will only allow for 30 days(hence VERY quick MOT if this is the way you need to go) so do it last and with proof of that plus all the other paperwork make an appointment with your local DVLA office to hand it all in with the Registration fee(see DVLA website) and a years tax.
This is where a manufacturers letter is better than an owners club or one of the other sources as you should not need the vehicle inspected by the DVLA---at least that's what is was last time i did it
Hope this helps and if anybody wants to talk about it PM me and i will send you contact details
Good luck
Bryan