AMA District 17 MX/SX Class Specifications
updated for 2011
Motocross/Stadium Motocross Class names, and
qualifications.
Please note that in the 50cc
classes there is a specific list authored by AMA for specific machines which are
for certain classes.
ALSO note, there are bike height,
and wheel sizes specific for all classes, that information is in the AMA rule
book.
Specific Rules pertaining to
Quad/ATV race equipment is also included in the AMA rule book.
Numbers for Motocross and Stadium
Motocross are assigned by the d-17 card processor.
| Class
Name |
AGE |
Motor
Size (cc) |
NOTES |
| 50cc
(4-8) |
4-8 yrs |
0-51cc |
Stock
Multi/Auto (class 3&4 AMA) |
| 50 Jr |
4-6 yrs |
0-51cc |
Stock Auto |
| 50 Sr |
7-8 yrs |
0-51cc |
Stock Auto |
| 65cc Jr |
 7-9 yrs |
59cc-65cc |
|
| 65cc Sr |
10-11 yrs |
59cc-65cc |
|
| 85 Jr |
9-11 yrs |
79-85cc |
|
| 85 Sr |
12-15 yrs |
79-85cc |
No
"A" riders |
| Super
Mini |
12-16 yrs |
79-150cc |
No
"A" riders |
| Schoolboy |
12-16 yrs |
80cc-125cc |
No
"A" riders |
| 125cc |
12 & up |
122-125cc |
|
| Open A |
14 & up |
122cc-Open |
|
| Open B |
14 & up |
122cc-Open |
|
| Open C |
14 & up |
122cc-Open |
|
| 250 A |
12 & Up |
122cc-250cc |
|
| 250 B |
12 & Up |
122cc-250cc |
|
| 250 C |
12 & Up |
122cc-250cc |
|
| 14*24 |
14-24yrs |
122cc-Open |
|
| 25+ |
25+ yrs |
122cc-Open |
|
| 30+ A |
30+ yrs |
122cc-Open |
|
| 30+ B/C |
30+ yrs |
122cc-Open |
|
| 40+ |
40+ yrs |
122cc-Open |
|
| 45+ |
45+ yrs |
122cc-Open |
|
| 50+ |
50+ yrs |
122cc-Open |
|
| 55+ |
55+ yrs |
122cc-Open |
|
| Women |
12 yrs &
Up |
99cc-250cc |
no
minicycles |
| 4-Wheel A |
16 yrs &
Up |
91cc-Open |
|
| 4-Wheel B |
16 yrs &
Up |
91cc-Open |
|
| 4-Wheel C |
16 yrs &
Up |
91cc-Open |
|
| 90cc
4-Wheel |
8-15 yrs |
71cc-90cc |
2 stroke |
| '' |
'' |
75cc-125cc |
4 stroke |
| 300cc
4-Wheel |
13-15 yrs |
90cc-200cc |
2
stroke |
| '' |
'' |
90cc-300cc |
4 stroke |
| Vintage |
|
8 model years or older.
any displacement |
No
"A" riders |