Sliders are eligible for their age related classes , my bike for example , #454 , 1968 Hagon frame , 1976 TT500 Yammy engine there-fore eligible for pre '78 , also eligible for the 263 and over Slider class.
If it was fitted with a 4B JAP engine , I wish it was , then it would be eligible for pre '70.
There are no rules laid down in the current GCRs for both the slider classes , ie, up to 250cc and 263cc and over, there is only just the Classes mentioned in GCR 18.2.2.1s and t
The only mention of any of the specialist Longtrack and Grasstrack Solo manufacturers in the GCRs for Classic Motocross and Dirt Track is in the Sidecar rules , Hagon ,
There are many manufacturers of the machines used in Aussie Dirt Track, Hagon , Godden , Elstar and Antig, to name a few.
It has always puzzled me that these makes are not mentioned in the Aussie Classic MX and DT eligibility rules as a great proportion of Short Circuit competitors in the ' 70s were mounted on these machines.
Foss