I’ve had a dig through some old emails from my dad when he went into a bit more detail about the motorbike and I thought I’d share it here. It really gives you an idea of what a special motorcycle this is.
A nice close up of the front end.

A nice close up of the front end.

‘The Cylinder head is from a 350 Matchless or AJS, also 50’s, which with its smallish valves gives high gas speed at low revs, which is why it pulls like a train. Point is no one valued 350cc bits and pieces 15 years ago – they all wanted 500cc stuff – so these bits were cheap and relatively plentiful. A “proper” 500 alloy competition engine was worth probably £ 1500 and I built the whole bike, everything, for less than £600 as I recall. And got, with the crank/piston relationship a full 500 anyway. The 85mm stroke flywheels make it rev like mad if you want. Ignition is a Chec PAL speedway bike magneto which I converted to manual timing control with my home made (about 20 attempts) back plate to carry the points. Very Trick.

Gearbox is a standard Burman type fitted to millions of 50’s road bikes, but with lightweight Norton clutch and shock absorber. Chain cases made from bits of Villiers cases all welded up by a pal of John’s who welds up nuclear subs. John welded up the oil tank from alloy too.

Back wheel from a 1956 James road bike with new rim, BSA brake back plate and linings. Severely modified and rebuild-able rear shock absorbers. Front forks from some 1970’s obscure British firm, possibly REH, with again my modified internals and damping, front wheel from auto-jumble. The Petrol tank is made for choppers in the 70’s with a lot of welding up.

The motorcycle in it's natural state, covered in mud.

The motorcycle in it's natural state, covered in mud.

And so on. I can’t think of much else except that it was made to compete in Pre’65 trials which I did a lot, including some of the major national ones, and it was always accepted as being in the spirit of the game, even if not totally authentic. I can’t remember how much it weighs, except that I used to be able to pick it up, and its wheelbase is much the same as a Tiger Cub’s, which was reckoned to be the yardstick, if you like teeny gurly bikes.’

Read an earlier post about the bike here

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