A lot of the NHRA drivers are small in person, they look bigger on TV.
When NHRA was here recently I got some autographs & talked to some like Ron Capps & Tony Schumacher & I was surprised how small they were compared to me & I'm not that big, 6'1", at 209 lbs.
The pro stock m/c riders are really small.
I know they don't want to be big to save weight if possible.