Showing posts with label side valve. Show all posts
Showing posts with label side valve. Show all posts

Friday, 24 October 2025

Model A - valve caps

 A post on the club Facebook page and a chance conversation with the Black Ariel spares officer has me looking at the valve caps on the Model A.

A fellow member was struggling to remove the exhaust valve cap on the club 1928 machine and ended up taking it off in pieces. I thought I would have a go with the club spanner I bought a few years ago:


The inlet cap came off quite easily - the exhaust cap is still refusing to move!



Friday, 17 July 2020

Model A - an introduction

You can't have too many bike projects. I may have too many bike projects, but when a new one comes along sometimes you can't afford to pass it up. Since I have got to know Ariels I have developed a love for the singles through my splendid W/NG, so when this 1930 Model A - the last year of the 'Black Ariels' came up I couldn't say no. More to the point, my wife was very encouraging too, so the deal was done.

Here she is. She's called Agatha.


A Model A is the most basic of the heavyweight single range, which means she has the 557 cc side valve engine, with a 3 speed hand change Sturmey Archer gearbox and the slim mudguards with no valance. She has no steering damper either, and she has the slim 300-20 tyres at both ends. However, her first owner, Mr James Johnston of Leightnie, Lethnot by Brechin who first registered the bike as a 5.5 hp Ariel on 15th July 1930 seems to have specified the chrome tank when he bought it from Duncan's of Brechin.

This is Duncan's, sometime in the late 1950's:


You can see from the map that she's not widely travelled.




It had been dispatched from the factory on the 26th May 1930, and has the original engine and gearbox. You'll note he also specified the Lucas electric lighting option (£5-10s extra), and he spent an extra £1 on the chrome plating option - the handlebars are chrome plated under the twist grip, not nickel plated:


Did he buy a horn? We don't know. He didn't buy a speedo.

I used Moving Motorcycles to bring it down from Scotland, and very good they were too; good communication, well handled and well packed.

It's pretty complete, apart from the front mudguard (that one is from the late 1940's) and the rear stand. I have the brake pedal and it's rod, the gear change and front brake rods and one of the footrests:


There are a lot of fatigue cracks in the primary case and in the rear mudguard, but nothing we can't fix:


Unusually, she has a BTH magneto. This is non-standard, and dates from the 40's so I think this is a period replacement.


Friday, 7 June 2013

Biker Chicks...


A friend from Houston, Texas sent me this picture this week. An interesting shot from the 1920's presumably from Holland.

Is this an Ariel publicity shot perhaps? the bikes are both from 1929 I think, one a side valve and one overhead valve, both new touring models?

And look at their faces - noses, smiles - are they related? Mother & daughter perhaps?