| Class Name |
Bike Description |
Rider Age |
More information... |
| Trailblazer |
70-110cc 4-stroke |
9-13 |
Trophy class. Once you race an age class on the big track, you are no longer eligible for this class. |
| Trailblazer Sr. |
125-150cc 4-stroke |
12-15 |
Trophy class. Once you race an age class on the big track, you are no longer eligible for this class. |
| 50 Jr. |
Stock 0-51cc single speed automatic (AMA Class 1) |
4-6 |
Trophy class. |
| 50 Sr. |
Stock 0-51cc single speed automatic (AMA Class 2) |
7-8 |
Trophy class. |
| 50 SS |
Stock 0-51cc single speed automatic (AMA Class 3); 2-stroke, oil injected |
4-8 |
Trophy class. Bike examples: oil injected KTM, Cobra PW3, Yamaha PW |
| 50 Trail |
Stock 0-51cc single or multi speed automatic (AMA class 4); 2-strokes must be air cooled and oil injected. |
4-8 |
Trophy class. Bike examples: Honda CRF, Yamaha TTR, Yamaha PW |
| 65 Jr. |
59-65cc |
7-9 |
Trophy class. |
| 65 Sr. |
59-65cc |
7-11 |
Trophy or dealer checks. |
| 85 C |
79-85cc |
10-15 |
Trophy class. For beginning racers. Riding 85cc Jr., Sr., or 9-13 automatically and immediately makes you ineligible for 85C. |
| 85 Jr. |
79-85cc |
7-11 |
Trophy or dealer checks. |
| 85 9-13 |
79-85cc |
9-13 |
Trophy or dealer checks. |
| 85 Sr. |
79-85cc;
75-150cc 4-stroke (no big wheels) - *New
|
12-15 |
Trophy or dealer checks. |
| SuperMini |
79-112cc 2-stroke;
75-150cc 4-stroke |
12-16 |
Trophy or dealer checks. "A" riders not eligible. |
| Schoolboy 1 |
86-125cc 2-stroke;
150cc 4-stroke |
12-16 |
Trophy or dealer checks. "A" riders not eligible. MIn. front wheel 19"; min. rear wheel 16". |
| Schoolboy 2 |
125-150cc 2-stroke;
126-250-cc 4-stroke |
12-16 |
Trophy or dealer checks. "A" riders not eligible. |
| 125 B/C |
122-125cc |
12 & up |
No AMA advancement points. |
| 250 A |
122-250cc |
12 & up* |
|
| 250 B |
122-250cc |
12 & up* |
Trophy or dealer check. |
| 250 C |
122-250cc |
12 & up* |
Trophy class. |
| Open A |
122cc - Open |
12 & up* |
|
| Open B |
122cc - Open |
12 & up* |
Trophy or dealer check. |
| Open C |
122cc - Open |
12 & up* |
Trophy class. |
| Open D |
122cc - Open |
12 & up* |
Trophy class. For beginning racers. |
| 14-24 |
122cc - Open |
14-24 |
Trophy or dealer check. |
| 25 Plus |
122cc - Open |
25 & up |
|
| 30 Plus** |
122cc - Open |
30 & up |
|
| 30 Plus B/C** |
122cc - Open |
30 & up |
Trophy class. |
| 35 Plus |
122cc - Open |
35 & up |
|
| 40 Plus** |
122cc - Open |
40 & up |
|
| 40 Plus B/C** |
122cc - Open |
40 & up |
Trophy class. |
| 45 Plus |
122cc - Open |
45 & up |
|
| 50 Plus |
122cc - Open |
50 & up |
|
| 60 Plus |
122cc - Open |
60 & up |
For novice racers. |
| VetSport |
122cc - Open |
25 & up |
Trophy class. |
| Women Jr. |
79-112cc 2-stroke; 150cc 4-stroke.
Min. age 12 to ride a supermini or 150. |
9-15 |
Trophy or dealer check. Minibikes or big wheels. |
| Women Sr. |
99-250cc |
12 & up* |
Trophy or dealer check. Min. front wheel 19";, min. rear wheel 16". |
| NonCurrent |
125cc - Open |
12 & up* |
Trophy class. Model year 2000 or older. |
| Class Name |
ATV Description |
Rider Age |
| *50 Limited Stock |
0-50cc Production; see ATVA National MX Supplemental Rules for eligile machines and mod's (www.atvmotocross.com) |
4-6 |
| *50 Production |
0-50cc Production; belt drive, CVT or automatic |
6-8 |
| **70 Production |
0-70cc Production; belt drive, CVT or automatic |
6-11 |
| *90 Stock |
51-90cc 2-stroke; 51-125cc 4-stroke. Production. Stock. 27" max. seat height. Beginner class. |
8-15 |
| **90 Production |
51-90cc 2-stroke; 51-125cc 4-stroke. Production. CVT or automatic. |
8-15 |
| **90 Mod |
51-90cc 2-stroke; 51-125cc 4-stroke. Manual or automatic clutch. |
8-15 |
| Schoolboy |
91-200cc 2-stroke; 91-300cc 4-stroke.
200-400cc 4-stroke
|
13-15
15-17
|
| Quad A |
91cc-Open |
16 & up |
| Quad B |
91cc-Open |
16 & up |
| Quad C |
91cc-Open |
16 & up |
| Women |
91-200cc 2-stroke; 91-300cc 4-stroke.
301-400cc 4-stroke
250cc & up 2-stroke; 401cc & up 4-stroke
|
13-15
15-17
16 & up
|
| 30 Plus |
91cc-Open |
30 & up |
** Anytime there are 10 or more entries in the 90 Production, 90 Modified and 70 Production combined, those classes will e combined into one moto and run on the big track.