classic motorcycle forum

Think you need to do the research before touching that bike.
In some markets, that could be nearly how it was supplied new.
Black was an option for some years, and not all bikes got the valanced mudguards.
Chromed oil tank could have been a dealer option, or previous owner modified.

Nice bike, as finds go...
Get all the mechanicals perfect, first ?

Don't know what it is, but you could turn up at an airshow with that and they'd have to let you in the gate !!  Great pix...

P.S. Which wheel(s) drive it ?

Actually, ES2's and Model 50s were sold in widelines for 1959 AND 1960.
But were not bolt-on rear subframes...

Suzuki TL1000 buckets are 28mm apparently.
And bigger than most modern stuff... ?

It may be possible to plate it or metalspray it with something if this is the only size available. Or sleeve the bore down.

Interesting frame pic, Thanks. Clear from this view it is quite different, but based on a manx type frame.  Those wheel types still look very similar, and the hole for where the front brake cable point used to be is still visible, before the brake was changed around.

A note on the Ronald Peck Special notes that it was fitted into a manx style frame sometime after that pic above was taken, still with earles type  forks though. These engines still rather look alike - can we see a pic of the clutch side of the engine, that clutch housing is very distinctive.
Cheers.

Wow, to begin,  that is one fabulous piece of motorcycle racing history.

Firstly, the frame appears to be based on a wideline Norton - if its not actually a genuine Norton featherbed or even a genuine manx featherbed frame. If you can find any numbers on it anywhere may identify it. Look on the left side of the swingarm support. A view of the whole thing could assist with narrowing it down a bit.

Now, that engine. Without seeing it all asembled in the bike, that engine bears quite some resemblance to a 250/4 that was built and raced from the early 1950s. The name that springs to mind was the Ronald Peck Special. Any relation ?  Syd Mularney later reportedly had it, and it was then sold on.  If its not that bike, it is something closely related ?  Any history would be quite interesting.
At some point we are probably going to ask your fathers name....

Potentially, it could be quite valuable, is historically significant in the extreme, and well worth restoring to race-worthy condition.
We assume you are in the UK ?

Got a pic of the rusty bits requiring replacement - or a pic of some clean bits requiring duplicating ?. Potentially a lot of engineering fiirms could do this, but reasonable cost is going to be a factor ? Perhaps someone knows some  4 cylinder specialists for older machines . ?  Might see who is suggested before commenting.

Thanks for pics.
Cheers.

Given that it sounds like they have sold you parts for a modern carb, you'd have to think that whoever you spoke to didn't have a clue.

Assuming you are in the UK, the name Martyn Bratby is mentioned in connection with older carbs. Hopefully someone can advise how to contact him.
Getting someone to fully set up what was even then quite a sophisticated intrument can be well worth it in the long run.. HopethisHelps.

Not knowing these at all, they would have been metal-spun in a lathe. ?

While such folk are rare these days, they are not extinct ?
A search through your local phone book will probably produce someone.