I have been through this process 3 times over the years and whilst you now may not need insurance to register the the bike  you still I believe need an MOT now you can transport the bike to and from the test centre but if you ride it there which you are allowed to do provided it is pre booked in you certainly at least need third party insurance.

I have a Pazon system fitted to my A65 been on for approx 6 years with no problems so far simple to fit just follow the instructions provided.

I do seem to remember some years ago when I restored my A65 from a basket case that I fitted the rear mudguard and wheel then had to remove them to fit the oil tank.

That number would indicate a 1961 engine. 1961 engines began DA10R-3001. 1962 engines began DA10R-5958 the HC does stand for high compression. You can check this out for yourself on the homepage for this site just click machine dating and follow the links.

The main problem with Mascot 910 is he does not have a V5c he only has the buff log book so his bike will no longer be on the DVLA records. So the bike will have to be reregistered and part of the process is it will have to be roadworthy if you already have a V5c for a bike then it is on the DVLA records and even if it has not been on the road for some time it can be easily taxed and will if applicable be MOT exempt.  I have been through this process of not having a V5c but a buff log book I mistakenly thought that the DVLA had all records but when I rang them up I was told that they only have records for vehicles with a V5c. Any vehicle that did not change from the old buff log books to the new  V5 back in the early1980's. At that time the vehicle records were held by the local authority but when these were transferred to the DVLA you had to apply for a new V5 which later became the V5c.
 As regards sending your Buff log book to the DVLA I would also be reluctant to send it by post when I did my new registration which was 6 years ago the local DVLA offices were still open they advised not to send it by post but what they did was to photocopy it and stamp the photocopy with an official stamp, sadly they said because of possible fraud you are not allowed to photocopy any documents yourself. I would ring the DVLA and find out what their proceedures are now they may have some way of allowing your log book to be photocopied.

I have been doing some more reading on this  and there was an update in Dec 2017 which states that if a vehicle is now currently exempt from an MOT because it is pre 1960 and has has been substantialy altered, if those alterations were carried out more than 30 years ago then it is still MOT exempt but if those alterations were done in the last 30 years even though at present it is exempt then from May it will require an MOT. Now as I said earlier what is substantial also as indicated in the Star article is fitting a sidecar less than 30 years ago going to be classed as a substantial change. In addition every time you tax your vehicle you will have to declare it MOT exempt and the way I read it you can only claim exemption when you tax the vehicle. MY current bikes are a 1956 A7 MOT exempt a 1963 A65 currently needing an MOT the Tax expires 30 April. MOT expires May 16th. So if I tax it from  the beginning May I cannot apply for Tax exemption until May 2019 or I could keep it off the road for all of May the apply for Tax and MOT exemption from June 2018. I think I will tax from May and get another MOT when the current one expires on 16th May.

Here are 2 photos of the set up on my early A65. I had to make my own version of the tickler as when I restored my A65 I could not find a supplier for the parts this may have changed now. It is not an ideal situation as when tickling the carb prior to start up you cannot see when the carb is flooding due to the design of the panels, I tend to hold the lever down for about 8 seconds then try to start it, most times it does but if after a few kicks if it does not then I hold the lever down for an extra 3 seconds and then it always starts.