Vintage AJS

This blog is about restoring vintage OHC AJS and Velocette motorcycles

Tuesday, 16 December 2025

WELCOME to my blog about restoring vintage overhead camshaft AJS and Velocette motorcycles

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  Apologies to anyone that has come to this page expecting to see exclusively vintage AJS motorcycles .....scroll down the page a bit and ...

The DOHC 250 Velo Engine: The Final Build – Part 1

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Before starting the final engine build there were a couple of jobs that I had postponed, simply because up to now there was always something...
Thursday, 4 December 2025

The DOHC 250 Velo Engine: Securing the Cylinder Head and Cambox

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Having completed the eccentric studs, the next step was to check the compression ratio – up to now I have had no means of bolting down the b...
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Contact Richard at vintage.ajs.uk@gmail.com

Vintage AJS
Richard Johns spent 45 years in the engine industry, starting in 1969 as a student with Perkins Engines. After completing a PhD at Imperial College, London in 1980 he subsequently worked for AVL in Graz, Austria, Ricardo Consulting Engineers and CD-adapco (now a division of Siemens) developing and applying Computational Fluid Dynamics software to IC engines before retiring in 2015. Since retiring, he spends his time restoring vintage motorcycles.
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