1985 Yamaha XS 400 "service manual uni aire" Questions

...Service Manual M395-10 - Clymer Yamaha XV535-1100 Virago 1981-2003 Repair Manual H802 - Haynes Yamaha XV Virago V-Twins 1981-2003 Repair Manual Microfiche Cards FICHE3296 - Microfiche Parts List ...