This interesting but incomplete 4-stroke engine was submitted by German reader Thomas Pompe, who sent along some images of his recent acquisition. Bore and stroke are 14.56 mm and 16.48 mm respectively for a displacement of 2.74 cc. The engine is missing its timer and carburettor – it seems to be a home-built engine which was never completed. Thomas hopes to complete it himself to get it running, but he would like to know more about it first.

This looks to me like a very praiseworthy attempt to build a model of a classic motorcycle engine.  The use of castings suggests that it may have been constructed from a kit. Can any reader provide any information regarding the origins of this engine?  If so, please get in touch!!