Stephen from the UK owns this incredible MC21. He built the bike from scratch, its a 1991 model and it is based on the F3 spec racers custom painted in a gold Cup Noodle scheme. The modification and parts list is too long to list here according to Stephen but he mentioned something like this "Quick spec is F3 motor including F3 crank and cases, F3 ign, F3 carbs, RS250 magteks, RS250 fornt forks, F3 rear shock, Dog fight pipes etc etc. The specs alittle to long to list I'm afraid. "