The Haynes Vintage Vespa Rotory Valves Workshop Manual 1959+ is a comprehensive guide designed for enthusiasts of vintage Vespa motorcycles. Published by Haynes in 1974, this manual provides detailed instructions for maintaining and repairing the rotory valves of Vespa models from the year 1959 and up With a focus on the unique characteristics of these classic scooters, this workshop manual is a valuable resource for motorcycle owners looking to enhance the performance and longevity of their vintage Vespa bikes.