Clymer Publications
Yamaha Service Repair Handbook Rotary Valve Singles 1963-1971 1st Print Clymer
It covers a range of popular models including JT1 Mini-Enduro, G5S-B, G6S, G5-S, YG5-T, U5E, YJ-2, MF-2, YF-1, and MJ-2. All orders are wrapped with care to arrive safely.