I HAVE BEEN THROUGH THIS FOR YEARS, ITS ALL IN THE RULE BOOK, READ IT, IF THE MACHINE OR PARTS ARE NOT PRE 65, PRE70, PRE 75 OR PRE 78 YOU CAN`T NOT USE IT, BUT IF IT IS A FLOW ON MODEL AND PAINT HAS ONLY BEEN THE CHANGE THAT WILL BE OK. WE KNOW SOMETIME IS CRUEL BUT ( ITS BLACK AND WHITE ).
Note If your bike was a pre 75 and you had lay down rear units, you can change it back to original or leave it the way it is and if you do, the bike must only be raced in pre78 classes only that is the rule. simple
Note. Bultaco MK8, HOW ANY ARE THERE ON THE TRACK RACING AS MK 7. Techincally MK8 ARE PRE 78 CLASS BIKES,