Wednesday, 20 July 2022

WELCOME to my blog about restoring vintage overhead camshaft AJS motorcycles

 

.....although a few other projects creep in from time to time.

The AJS 33/7 Trophy project has been progressing reasonably well during the past few weeks although helping our Ukrainian guests to navigate the UK governments bureaucracy has taken out quite a bit of "shed time" and the extremely high temperatures that the UK and most of continental Europe have been experiencing have not made for pleasent working.

Nevertheless, there has been reasonable progress and I now have a rolling chassis with many more detailed bits and pieces done.


Further details here.

During the last couple of years I have posted quite a lot of information and to aid navigation the "Labels" section on the right side of this page list the various projects.

The labels marked "INDEX" give a link to a page that provides a complete list and links to all of the separate sub-projects related to that main project.

Alternatively, scroll down this page and see what's here...

I already owned (and still own) a 500cc AJS R10


that I've been riding for many years and wanted an early 350cc bike. I bought one at a Bonhams auction; this is what I brought home....

....a bit of work was needed to bring it to back to life 

Full details of the restoration can be found here.

During the restoration of the K7 I figured that I could put an early overhead camshaft Velocette cylinder, cylinder head and cambox onto the crankcases of an AJS 350cc engine from 1931, convert it to chain-driven OHC and make an engine that looks like a K7 but has a Velocette top-end. I had a 1928 350cc AJS sidevalve that I had bought on eBay and used that to create the AJcette ....giving credit to both manufacturers.

It looks pretty similar to the K7 and to demonstrate that there really are 2 bikes, here they are both together.


Details of the AJcette project can be found here.

I have quite a lot of early Mk1 OHC Velocette parts and after completing the AJcette I decided to try and make a replica of a one-off bike that AJS built in 1929/1930 for an attempt on the world speed record. The original is a huge V-Twin beast that started out with a naturally-aspirated engine but, having failed to gain the record, was supercharged ...and again failed. The bike ended up in Tasmania for many years and, after being repatriated to the UK and restored, it is now in the National Motorcycle Museum.

This is what the original looked like:

and this is my recreation.

 

 

Like the AJcette, the V-Twin uses Mk 1 OHC Velocette cylinder components. The full story of how this bike was built can be found in the links here.

There is also a 14 minute edited Youtube summary of how these bikes came about here and a longer unedited version here.

....and so to the current project. I have started (January 2022) the restoration of a 1933 AJS Trophy Model.

The Index Page for this ongoing project can be found here and I'll add more  as the project evolves.

I also reported on a couple of my other projects ....vintage OHV Nortons


 and putting a Marshall supercharger onto my 1934 MG PA

 


I hope you find something of interest.