After Building his Petter Ambassador machine Ernie Dorsett went on to put a Robin DY30 engine (kindly lent by Roger Kimbell & Paul Holdsworth, Directors of Robin Redbreast Industries) into a Matchless frame. This particular engine has a capacity of 299cc and produces 5.5 BHP. Max RPM is 3600 while bore and stroke are 76mm x 66mm respectively. Compression is 21:1. Frame used was from a 1952 model.Wheels, forks and gearbox are all from 1960 while tank is 62/63. The Robin silencer was retained and can clearly be seen behind and to the side of the engine.
Here is Ernie Dorsett with his second Matchless machine. This machine was fitted with the larger DY41 engine, 412cc which produces 8.5 BHP at 3600RPM. This unit was used on the Later Royal Enfield models. Again this engine was donated by Robin for the project. The frame is a G3.
The 2nd Matchless/AJS framed Diesel Motorcycle from Ernie Dorsett.
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