Coffin Dodger

Hi folks Not sure if anyone can help me , but i am purchasing an FZR thou Exup RU, 1991 on a J plate subject to her being HPI clear etc. I have the chassis number etc and just wanted to confirm that it's definitely a uk bike and not an import. Would anyone know what number and letters etc the uk bikes chassis numbers are so that i can confirm ? Had a gixxer 750Y that i sold last year due to personal reasons and now fancied something else, but not quite as dear. Will i notice much difference in power , handling etc. If anyone has an opinion of the RU i'd love to hear them, good or bad. Many thanks in advance. CD