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MichaelDanger, I also would love to ride a small cc bike on a Kart track. I have not found a track local to me that has a policy of allowing bike to participate. I would buy an XR or another KX80 in a minute if I had such a place to practice. I did have a company that would allow me to ride on their fence enclosed lot for a summer. That was for a single year then they decided the risk of liability was too great. I did a lot of dirt bike riding on many track in my youth but have not in several years. I have an invitation to race in a Trail type MX race this fall while I am in the Philippines but am having reservations because I dont like the idea of major injury while on vacation. What I should and probly will do is to run the race at 65/70% pace to be as safe as possible and just accept the results.