This is for anyone thats interested. I found a site and contacted them. Here is the email I got back
Classes are quite simple this year; Youth, 450 & Open.
I am assuming it's a 125 two stroke, in which case you would only be able to
compete in either the 450 or Open as the Youth Class has engine size limits.
You need to be 14 to ride a 125cc Two Stroke in either the 450 or Open
classes. At NORA Sport qualifying produces groups based on lap times so you
wouldn't be at a great disadvantage on a 125 as the people around you would
all be at similar speeds.
Please read these documents first:
http://www.motogb.net/index.php?categoryid...p;p13_fileid=79
http://www.motogb.net/index.php?categoryid...p;p13_fileid=76
If you are new to Supermoto, you should also read this first:
http://www.motogb.net/index.php?categoryid...p2_articleid=55