Main concern about a bike that hasen't gone for a while, electric start........make sure the battery is fully charged, and the carby's........biggest problem.......if they have had stale fuel in them for some time, this could cause a major headache for the starter, especially the pilot jets which readily block up with stale fuel.......this would apply to either Mk 1 or 2 Concentrics, Mikuni's, or Dellortos.........let us know what carbs it has so we can assist you in checking any of these........cheers........Greg.