Work in progress, figured it would be cool to have a home for the crazy revving motors from the 80’s through to 2006 ish.
Rotax DSD, 1995-1997
For senior drivers (16+) there were three main classes which were european CIK\FIA based:
Formula Super A
ICA was reed only. Cylinder head volume and port timing restrictions. 24mm carb only.
JICA was Piston port only, 24mm carb. I think it was limited models of carb too. Walbro and baroni?
FA and FSA were rotary only until 2001 (ish). Basically once water cooled came in. Then you could pick between reed or rotary.
FA 24mm butterfly carb, FSA up to 30 and a slide.
Reeds became the dominant force by the end with the TM K11b being regarded as one the fastest 100cc of all time. 101mm conrod I think which was kinda weird.
Quite a few national champs went reed and rotary during aircooled era in a “100 libre” class. 24mm carb.