I do wonder why you say "No motorcycle tires". One of my bicycles runs motorcycle tires because I got tired of fixing flats in the desert. I traded some weight for reliability.
Thanks
B
We are racing "Motorized Bicycles" and the "No motorcycle tires" is an
essential rule that prevents them from turning into motorcycles and
keeps the bikes looking like bicycles.
Also using motorcycle tires would add a lot to the cost of racing.
There is a strong consensus among the SoCal guys that it's a good rule
that isn't being changed.
There are a lot of bicycle tire choices that are being used successfully.
There is no problems with getting flats at Grange Motor Circuit which
is an asphalt paved track that isn't infested with thorns.
No Motorcycle tires allowed. Some Moped tires have been allowed.
The only other rules are that you have to have functioning pedals.
Catch cans are required on 4 strokes if they don't route the crankcase
fumes into the air cleaner.
Kill switches are required.
Common sense safety stuff like having ball ends on hand levers so they
don't hurt you and remove mirrors and tape over glass headlights, etc.