ALUMINIUM BRONZE VALVES https://blog.dnevnik.hr/aluminium-bronze-valves

Here is the story of how this bike developed into its present state.
The bike was purhased from a dealer in 2008 by the previous owner. It was described as a running and restorable 1957 B31.
On delivery it was clear the bike had not been run for a very long time, after a little bit of tinkering it was fired up, but sounded like a box full of spanners and the big end was shot so a full strip down was required. After the strip and examination it was found to be in a far worse state.
So the rebuild commenced with the idea of a special to show what the B31 could be capable of.
The bike was given the name 'Claude' and was to become a B31 Clubman Goldstar Replica.
The frame was modified with lugs being added for rear sets, then a genuine Goldstar swinging arm was found and was re worked with phosphor bronze bushes to improve the handling. then the forks came from an A65 lightning Clubman then fitted with clip ons on hard chrome stanchions.
The engine was rebuilt to early Goldstar touring specification, the Cylinder head ported and gas flowed to BB32 dimensions with BB32 valves, springs and cams. The bottom end is to BB31 spec, with new big end assembly, but with a polished and lightened aluminium con rod as to ZB32 Goldstar long rod spec. The Barrel is a Phil Pearson big bore conversion, 400cc with a Wiseco forged piston, 9:7:1 which is estimated to take the engine to 32bhp.
Then the gearbox was completley rebuilt with new seals and bushes and is now one down and three up.
A brand new Amal carb 389 - 11/8 was found and added along with Replica Clubmans Tank, Seat,Clocks and Exhaust system, the silencer giving the Goldstar twitter sound.
The wheels are aluminuim spoked type addapted to fit the swinging arm and forks.
When Claude was run in it was found after 4000 rpm he hits the powerband and really will go! He revs to 7500 rpm with an estimated top speed of 90mph safely and is probably capable of 100mph.
This is not my story but it was amongst the paper work and mountain of receipts that came with the bike when purchased, I just thought it had to be told because the bike is a real credit to the guy who built it.
The bike was called because of a Claude Rye bike dealer of London badge it had on its back mudguard. He was a bike dealer in the 60s and 70s.
I have always looked at my previous and present bikes as all being girls, it seems I have now got one that is a bloke lol.

In the Summer of 1930 around the time it first appeared, O M Baldwin Rider, 990cc. The 50 Deg engine had cylinders turned from a solid billet of steel, the heads were Aluminium with bronze valve seats and guides, the single OHC valve gear was chain driven, the two cam shafts having separate chains, the inlet ports were located at the rear of each cylinder head a major change to the usual V-Twin design of the time. Basically the engine was designed around a pair of 500cc OHC AJS Racing motors joined on a common crankcase. A full Duplex frame. Three Speed Sturmey Archer Gearbox with ratio's of 3.2, 4.3 and 7.8 : 1. Unsupercharged at this point , ignition by Magneto, self aligning ball bearings in the front forks, it got a reputation as a "CAMEL" to ride and a very unreliable one as well, but attained 130mph all the same. It disappeared around this time to resurface in 1933.Specification:

Engine - 990cc V Twin
Compression ratio -
Transmission - 3 speed
Tyres - 26"
Top speed - 130mph
Price new - ?

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