1970'S Yamaha Pressure Testing Diagnostics on the 2-Stroke Engine Training film

This film strip shows and describes the procedure necessary to properly perform engine pressure testing on a 1970's 2-stroke Yamaha motorcycle.
Yamaha supplied their dealerships with the images on microfiche and the audio commentary on cassette tape. The images were scanned and restored, the audio converted, then the combined edited into the slideshow seen here. This source material came from my personal collection. This film was not downloaded from any website and is not reused content. This restoration and presentation of the training material is my work.