A question. Can i use 1978 yamaha xs650 on an xs650 frame from 1981

I basically have an old xs650 without a title. I know man parting out an 81 xs650 I was going to try and buy the frame with a title and put all the parts from the 78 on the 81? Does anyone know the comparability for this move ? via /r/CafeRacers https://www.reddit.com/r/CafeRacers/comments/8ktr2q/a_question_can_i_use_1978_yamaha_xs650_on_an/?utm_source=ifttt