Ya got it in one, Jim , with the Slider rules , there ain't none !!
The ONLY mention of Sliders in the Classic Motocross and Dirt Track rules is on page 162 of Moms , GCR 18.2.2.1s and GCR 18.2.2.1t
which states the two capacity classes , up to 250 and 263 and over, thats it !!
In conversation with the Race Secretaries of both the last two National Classic Championships , I advised them that, due to lack of any specifications for Classic Sliders, they should apply the pre 85 principle and also that Sliders are eligible for their year and capacity related classes as well.
One thing that I would like to see listed in the Classic GCRs , as eligible makes for Classic Dirt Track , the many slider manufacturers such as Hagon, Elstar, Antig, Ansel , Godden, Dula, etc as well as the American Dirt-Track makes , these firms are motorcycle makers in their own right , just as much as any major manufacturer who sources their motors from another make.
The machine eligibility rules for Classic Motocross and Dirt Track are slanted towards MX and Enduro manufacturers, you dont see Hagon ,Harley or Champion or Redline in there !!
OK had me two bobs worth
See Ya at Griffith
Foss