Where are you located and what exact series is not allowing you to race ?
In general its a playbike and most Pit bike events have classes for playbikes
I know we do ...

 

A lot of times they consider a pitbike an open cradle frame with a horizontal motor.

 

A lot of places divide the classes based on wheel sizes. Small wheels= sketchy. Larger wheels are much more stable.
I once tried to ride a pitbike on a sand track. The front end would tuck if I even thought about touching the front brake! LOL

 

In classic terms-- no. It's a Trail or Play bike. The way the scene has gone-- you'd think they'd let almost anything into the races. I don't even use the Pit bike name anymore, because it seems like it brings back the hangover of 2008 or so, when the scene was way over filled with expensive parts, bikes, etc, and nobody wanting to race them. I call what we do "Mini MX" these days. --L*64

 

Welcome to PM! Up here it's so low keyed that they race everything from 50cc race bikes to crf 100's.Just go to the race,sign up and have fun!

 

Ya i see where you come from i had a 80 and it seems like i can handle that bike way better then a 100.

 

You can start any campaign you want, but ultimately its gonna be up to each individual track owner to decide. Few are gonna go against there regulars, and upset them by bringing in a bike with larger wheels.

 

My 110 with stock gearing stock motor clutch kit exhaust and pod filter. I would keep up with the crfs around corners. But longer straights it would walk the 110.

 

To me, it doesn't matter what its classified as. get enough people on them and race em! I have a group that rides/races 100's because to us they are the cheapest mini bike an adult can ride. out here, we had the 150f class which is air cooled, 4 stroke, 2 valve engines. crf150f will beat the 100 down the straight, but the 100 will out corner the 150f.
To me, that's the fun about mini bikes. cheap and equal(ish)