1982 Yamaha XJ 650 "xj650 hard start cold" Questions

xj650 turbo charged motorcycle and I'm having problems starting it. It has sat for a couple months without being started. It attempts to start right away then just cranks over with no results. It will

...hard to tell without seeing the bike when it happens, and if im wrong just repost the question, but it sounds like a problem with the vacumn fuel tap.When it stops can you place the fuel tap on pri ...