Anyone know what this is?

[Bendernz]

At the annual classic racing festival here in NZ and this was on display. It's what we'd call a bitza - bitza this and bitza that.

The guys who found it, literally, in a barn, want to know what the engine is and so far no-one has been able to tell them. Any clues from the knowledgeable on here would be appreciated.

It runs, by the way.

[lamotovita]

I wish I could help. Are there valve springs in the combustion chamber? I don't think it's a two stroke, is it?

[dnrobertson]

4 stroke Side valve engine?

Carby much newer than engine.

Seperate gearbox

Guessing English engine. But doesn't look like any Triump on this page: http://motorbike-search-engine.co.uk...otorcycles.php

Wish my dad wasn't living in the land of the fairies as he would know in 21 seconds.

[ken_the_carp]

Definitely a 4stroke, both the cylinder and head are cast as single unit. The pine cone plugs allow you to drop valves in. I'd say late 1920s ajs, matchless..
Ken

[lamotovita]

Originally Posted by ken_the_carp

Definitely a 4stroke, both the cylinder and head are cast as single unit. The pine cone plugs allow you to drop valves in. I'd say late 1920s ajs, matchless..
Ken

Why are the plugs so tall?

[Bendernz]

Oops, it's a four stroke so shouldn't be in this section.

However, led by sound information from Mr Gatorjane it appears to be a 1928 Enfield 350 side valve.

And it still runs.

Fantastic.

[ken_the_carp]

Originally Posted by lamotovita

Why are the plugs so tall?

I assume the "fins" help to cool the valve area. I'm currently working on a 32 Matchless, same set-up, top end is is one casting with the tall alloy plugs.
There is something amazing about an 85 year old bike that's still a daily rider. Yes this in the wrong thread.
Ken