I find myself on a mini roadracer once in awhile... The top classes are 85cc 2-strokes usually running production 125GP bike chassis, and the 85cc 2-stroke motards. They have various classes for pocket-bikes, scooters, NSR50s, 100-125cc 4-strokes and modified 100-150cc 4strokes, etc... lots of variety of riders... boys, girls, men, women, fathers, mothers, sons, daughters from many different racing disciplines and even some ex-Superbike champions.
i often bring a camera... so here's some shots from the Greg Moore Kart Track in Chilliwack, BC from last summer...
--- or since the system only allows one image -- here's one

"Zounds! Zorched by Zarches, Spaceman Spiff's crippled craft crashes on planet Plootarg!"
For Sale: Ninja 600 with parts bike, needs minor work, $30, no title... (GEE THAT DOESNT RING ANY WARNING BELLS DOES IT?)