504e Full Rebuild

The old 504e from an Armstrong CV500 fired up for the first time in years on the test bed this morning. This engine has been entirely stripped, cases all powder coated satin black. All bearings, rings, clutch, seals and gaskets all replaced and finished off with the...

Electric Start Conversion

Latest Rebuild is to convert a 504 kick start engine into a 504 electric start engine.  As the parts can be difficult or expensive to source individually a seized 348 is being used as the donor for the parts.. These are all the parts required  to carry out the...

Omega Pistons

More Pictures of the 89.25 First Over Size and 89.25 Slipper Pistons. These are available for £198.00 First Oversize and £210 for the Slipper Piston. As you can see from the pictures this is for the entire Piston Kit. After working closely with Omega Pistons, we have...

Team Sportax

Team Sportax getting ready to race at Farleigh Castle 2013 L to R: Paul Hodgkins 500 Armstrong, Jack Johns 500 Armstrong, Gary Wigston 500 Armstrong, Dave Hobbs 560 Armstrong

Engine Test Bed

Here’s a picture of the latest engine rebuild on the test bed. This 504 Mil has had the works, new clutch, new cylinder liner, new piston, valves reground and all new seals and gaskets. It fired up straight the way and ticked over like a sewing machine! Should...

Dynojet Test Day

On Saturday 16th November Team Sportax went along to the Dynojet test day organised by Ady of the MT Riders Club. We ran a 350e Harley Davidson with a Mikuni Carb. A 560e in a HD a 500e in another HD and a couple of 500 Armstrongs. Interesting results from all the...