Bahnsy, I am one of those boffins you describe so well, who do you think you are to describe ma,mv volounteers, officals in this way.
Scenario 4, 1980 KX 250 is a single shock linkage rear end, pre 85 bike.
The rules for pre 75 & earlier started off like much like the current evo class rules,very basic and over time have evolved to what we have now.
Anyone can write to the (MA)classic mx committee with concerns,changes, additions to rules and it will be discussed and voted on by them, you can also apply to be join the classic mx commision.
Additions to the supp regs for up coming Aussie titles could be in place if people made the effort to write to the MA classic management committee.
Motorcycling Victoria backed, Victorian classic motorcross management committe run the VCM series which has an evo class, evo class was introduced in 2007 as per GCR's.
The class turned out to be very popular with no problems encountered, however parts such as 83 CR or 83 RM forks are not allowed.
Hybrid bikes made from EVO bike parts or aftermarket parts from the era are acceptable.