51CC               4-6
51CC               7-8
51CC               OIL INJECTED
51CC               OPEN
65CC                7-9
65CC               10-11
PRETEEN         65CC - 85CC   7-11
85CC               BEGGINER, (9-15) (79CC-112CC) BIG WHEELS OK
85CC               7-11 NO BIG WHEELS OR 150CC
85CC               12-13 NO BIG WHEELS OR 150CC
SUPERMINI     12-16 79-112CC 2 STROKE, 
                        UP TO 150CC 4 STROKE
    
GIRLS              9-13    65CC - 112CC
WOMEN           12 AND UP, 99CC AND UP
MX LITES         A (PRO) (125CC - 250CC 2 AND 4 STROKES)
MX LITES         B (125CC - 250CC 2 AND 4 STROKES)
MX LITES         C (125CC- 250CC 2 AND 4 STROKES)
MX LITES         D (BEGGINER) (125CC - 250CC 2 AND 4 STROKES)
MOTOCROSS    A (PRO) (250CC AND UP)
MOTOCROSS    B (250CC AND UP)
MOTOCROSS    C (250CC AND UP)
MOTOCROSS    D (250CC AND UP)
4 STROKE         (201CC - 450CC  NON PRO)
UNLIMITED      (14-24)  (125CC AND UP)
25 PLUS           25 YEARS AND UP
30 PLUS           30 YEARS AND UP
40 PLUS           40 YEARS AND UP
EXHIBITION     SMALL 4 STROKE,  (70 - 110 CC)
YOUTH             12 - 15,  85CC - 125CC
SCHOOL BOY   14-16,  112CC - 250CC
ENDURO           TRAIL BIKES, NON MX BIKES