I'm gonna say this again not trying to be "the know eveything spew master" but it would seem that there are only 3 "ture race" compound tires and the rest are just relabled as "minimotard tires".
All the manufactures now sell "minimotard tires" they are old model tires with a new sales pitch to spin up sales
You can run what every they are selling that fits as this sport is so "new" to Americans. We run minitards cause dirt ballers are easy to come by with low cost compared to the YSR, NSR bikes and the Metrakits plus we like to hot-rod anything we can.
I have to believe the 2007 season is gonna shake things up with the people really wanting to go faster they are going to find that tires are the number 1 thing next to suspension that will lower their lap times.
to achive faster speeds you need these 4 things:
Sticky Tires
Adjustable Suspension
HP/Torque
Rider abillity
Almost in that order............