TRYING TO IDENTIFY MY GRANDFATHERS MOTORBIKE

[R]

Those rear plunger units look very Norton.
They have to be 1947, at least.
And they are slanted forwards, so probably work better than on Nortons even.

Also, the back mudguard looks very Norton.
Off a Model 7 twin, with the ridge down the centre.

With a good polish and the tank painted, it will look very smart.
And its history proudly preserved.
Show us how it finishes up ?

[33d6]

Where is the sidecar? It adds even more style to what is already a lovely bike.
Any one can have a lovely bike but a lovely bike with an impossibly smart sporting sidecar as shown in your first set of photos is lifted in to a class of its own.

[XAVI_MONTORNES]

Thank you very much for helping me. I am going to restore it without modifications !!!  I hope I can post a photo when it's ready👍👍

[R]

Just to clarify - you are going to restore it as is.
Or remove all the modifications ?
Preserving all that history is vital.

Not sure I should have asked ...

[XAVI_MONTORNES]

in principle I will keep the modifications!  I will look for your carburetor and everything adjusted.  you may need some link to find spare parts.  I will make the deposit original.

[mini-me]

I had a lot of dealings with the vintage guys down in Spain during the 1980s.
There is quite a resevoir of old bikes down there but lots have been heavily modified,often ingeniously, as Franco stopped all imports.
The Spanish army used ohv nortons, and officers issued with ohc Velos.

pre Franco Spain was quite big market for British bikes.
that Norton type plunger set up was an after market thing .I have seen some brilliant engineering out there to keep stuff on the road, and some a balcksmith would be embarrassed by.
Last time I was out  there I me a guy making cam followers for OHV Nortons, and a Lucas type magneto entirely made from scratch.

Some really class bikes out there, I have seen three OHC Matchless from the 1920s; G45, mk 8 KTT Velo,  Manx, Inter, 7R  and a chopperised OHC Ariel 4!!!   I personally sent out some very good bikes, and once used to cut the  rear  fork ends off old 16H frames to replace those plunger conversions.

[XAVI_MONTORNES]

Thank you very much for the explication .  we will do the restoration with a very expert friend!  When this list I will publish pictures and I hope you like them.  thank you very much again for the help.  my grandfather sure that wherever he is he will feel happy and content.  👏👏✊✊