I am 55 and when I started my 1/4 mile runs at the track the only requirement was long pants and a face shield. My 1st 10:60 run was on a 1980 LTD1000 with a 1200 kit 10.0 pistons very light kleen up on the head and 3X cams stock wheel base and low profile radial tire that some one gave to me because they did not like it.
Say what you want but back in the day a 10:60 with jeans t-shirt 3/4 helmet with a shield was just a bit scary and I was a teenager.
2008 ZX14
2001 ZRX1200