Motorcycle racing in the USA used to be a huge spectator sport. Big enough that they held an ST and a TT race in one weekend at the Houston Astrodome. According to memory, the engine limit for AMA Short Track (ST) races was 250cc for 2-strokes.
The fastest film I could find in those days was ASA 400 (ISO 400). The color shots here were exposed at 400. The B&W images were exposed for ISO 1600 and pushed in processing.
Many thanks to www.AMANationalNumber.com for publishing a historical record of national numbers !
I can not remember what year the AMA ‘changed things’, but at least up through 1982, national plate numbers were issued based on total points received for short track, mile, TT, and road racing all added up.
That’s me blowing a base gasket.
Howdy, TJ ! What was your AMA # that year?
16N