there is a good "clone class" most use a Harbor Frieght motor that runs less then 150, then you must use a specific clutch & header. I don't know if any michigan tracks race these.
There is a yamaha 100CC class that has been around a long time. Often called KT-100
dirt tracks run more 4 cycle stuff
There are roughly 3 types of kart racing
Short track road course (1/4 mile to 1 mile length)
Road (Enduro) Racing, 2 to 3.5 Mile tracks (Sports car tracks)
Oval ... ussally dirt, some asphalt, 1/4 mile down to about 1/10 mile.
Small amount of winter indoor oval racing.
Really the dirt oval is the biggest participation, but if your not in that circle you here less ....
For that checkout .... bobs4cycle ... a great ... the #1 ... dirt forum....
Last edited by rideraa; March 1st, 2010 at 08:36 PM.