Kill switch installed, numbers on both sides and front. Got all the rider safety gear for my son. Went over all the safety flags and their meanings, track safety, and entering and leaving the track safely. Anything else I may have forgot for a newbie?

 :)I have been to a few races with my friends and now I want to get my 8 year old son involved, I have a Yamaha TTR 90 and was wondering if anyone could give me some pointers on how to get it ready for the flat track. He has a lot of experience on the bike and riding cross country, but it will be his first race situation. Thanks for any help.