This book covers the process of building 4-stroke engines to a professional standard, from selecting materials and planning work, right through to methods of final assembly and testing. It is written for the DIY engine builder in an easy-to-understand style, supported by approximately 200 photographs and original drawings. Containing five engine inspection and build sheets, and the contact details of approximately 45 specialist manufacturers and motorsport suppliers, it explains build methods common to all 4-stroke engines, rather than specific makes or models. This is an essential purchase for all engine-building enthusiasts.