Yamaha Shop Guide to Theory Maintenance Troubleshooting Repair with a copyright 1969.    This manual was published by Yamaha to give mechanics information concerning popular Yamaha motorcycle models of the 1960s.  There is a section with speed tuning tips, electrical and crankshaft repair  for several models. 

The book is in fair condition. The cover has a burn hole in it. Some pages are discolored. All pages appear to be intact. 

Please look at photos for condition. 

Feel free to contact me with any questions.