1985 Yamaha XS 400 "1981 virago xv 750" Questions

...Virago 1981-2003 Repair Manual H802 - Haynes Yamaha XV Virago V-Twins 1981-2003 Repair Manual Microfiche Cards FICHE3296 - Microfiche Parts List Brakes VB-230 - Vesrah Brake Shoes VD-236JL - Vesrah ...

...1981 engine of 1987 Yamaha xj 750 maxim to be fitted without major modifications? And if other parts such as wheels, fork, tank can also be fitted wit hout major modifications? Thank you in advance. ...

...1981 yamaha 750 Virago. I had it started when I first was working on it. It died while driving. Have not been able to start. Now it backfires when I prime it. I took off and cleaned the carburator. ...