KTM, along with Kawasaki, first brought out rear discs in 1986.
The VTR rules are technology based like the Evo class in VMX is/was. I don't particularly agree, but they don't offend me, and it doesn't really matter for non-competitive events.
If it's an uncompetitive event, then what difference does usd forks and a disc make? It's just for the ride right?
Just saying is all....
No idea what the reason is evo550, that is where VTR have chosen to, as Nathan says, "draw the line in the sand", their decision as to what constitutes a vintage bike from a modern bike and trying to include as many bikes and members as they can without excluding bikes that are clearly (in their eyes) not modern I guess.
I guess it can be argued what makes a bike modern vs vintage and that will be a subject of debate for many years to come, I don't believe VERI have it wrong, nor do I believe that VTR have it wrong, I'll abide by the rules of the club I choose to be a member of and live with it.
If I choose to ride in Victoria, my home state, I will simply take my "eligible" 1982 PE175, however in NSW I will have the choice of either the PE or my '88 Husky 400WR, or both!
Tony.