classic motorcycle forum

Any relation to this beastie ?

http://www.carandclassic.co.uk/car/C254954#

Which cleverly shows no pics of said toolbox.

Toolboxes then were often tin rectangular boxes, with a leather cover with little belt and buckle as the front. There were even standard sizes (?), what size ye be needing ? Or what size is the space it needs to fit ?

Places like Pioneer Cycles or the VMCC will likely have photocopies of sales brochures and maybe owners manuals, always helpful.

Hopethishelps.

Wiki has a pic of a 34 Deluxe 350
http://en.wikipedia.org/wiki/File:Montgomery_De_Luxe_350_KK_JAP_1934_links.jpg

Front and back mudguards look a little unmatched  ?

<snip>
Anyway  isn't this this is a bike site

Indeed. But owning an old bike is becoming a luxury, and it seems lawmakers are determined to make it more difficult. Worth keeping an eye on, and we'd be remiss in not informing / commenting on developments on this front ?

Even that bastion of something, the BBC, is today reporting that 75% of wealth is in the hands of 25% of the population (not sure where those numbers apply to) as though that was something that needs changing...

Quote Bike magazine November 2011
"It cost £595.  ]That's the equivalent of £6771 today

Where did someone get that conversion from I wonder ?
If you look at wages then and now, and the cost of houses then and now, some would suggest that the modern equivalent is grossly inadequate.

600 quid in 1971 would be a fair bits of a years wages ?
£6771 today is not much of a years wages

??

Sounds like the previous owner was into these then, cleaned it /greased it, and found it didn't help, so bought new parts. 
Pretty good I'd say, far better than finding a mess that needs major work.

Yep,
Doubling the speed increases drag, theoretically by a factor of 4, which is where I got confused with my figures, but you are right according to physics, doubling the speed of a vehicle will take the cubed root, 2 x 2 x 2 = 8 times or an 800% increase in power, however,  it doesn't quite work out like that, say 25 bhp motorcycle gave you 80 mph, in theory then to do 160 mph you would need 200 bhp!  So something else must come into play  than just drag co-efficients.

8 times the power to double the speed, due entirely to air resistance,  is actually a pretty good basepoint for these things.

It takes about 10 hp to do 60 mph, and the first 20 or 30 mph don't really count in the wind resistance stakes - so just 3 hp will do 40 mph. And a healthy 30 bhp to do 100 mph.

A 55 hp Vincent does 125 mph, so to do 250 mph it would need 440 bhp. Which is obviously off the planet, but so is a 250 mph naked Vincent.  Rollie Free with his bathing suit showed there is more to life than horsepower though.

Once you add a full fairing, things improve - and a Honda MotoGP bike with pneumatic valve springs making 270 bhp @ 19,000 rpm gets about 345 kph on the longest straight in MotoGP - thats approx 215 mph.

The Aprilia 250 GP bikes are currently getting ~440 bhp/litre, so a 1000cc version of one, if that were possible, should get that 250 mph easily. Except that this year is the last year for them, next year they go 4 stroke Moto3 spec.

And the Gatsos get ya if you wind it on in 3rd gear. Or even 2nd...

Cheers.

Tank doesn't ring any bells.
Might have to install it on the bike with everything, and then see if any old pics show anything similar.

The makers of alloy tanks over the years must number in the hundreds, unless they signed it or you can trace the original owner may be difficult to find the maker.