I think the Bridgestone BT45 is the tire of choice for narrow wheel road racing.
That puts a 100-width tire on a little Honda SS50Z. Not what I was hoping for.
I changed my class from 125 to 175, but even the M/G-125/4 was likely to break 70, so a one-pass weekend.
I saw what I think was 22/2.50-17 dragster tires on both wheels of a racer when at Maxton, 2 years ago. Legal for both wheels?