RULE BOOK: Governed by the AMA Sports Rule Book.  Supplemental rules may apply.

AGE REQUIREMENTS: The age of the rider is determined by the date of the event, except in youth competition.  A youth rider's age as Nov. 1 will determine his/her age for the event.  A referee or clerk may request a rider's proof of age. Age requirements for all classes as follows.

• 50cc: 4-8 years of age
• 65cc: 7-11 years of age
• 85cc: 7-15 years of age
• 250: Minimum 12 years of age
• 450: Minimum 14 years of age

ENGINE DISPLACEMENT: No engine displacement larger than 250cc 2-stroke or 450cc 4-stroke allowed to compete.

NUMBER PLATES:  

• Must be readable and on all three sides of machine

MINICYCLES: All Minicycle class machines must be run in the class for which they were originally manufactured, excluding the Schoolboy class.