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32 classes · one championship

FIND YOUR
GATE.

Search by bike, age, displacement or skill level. Open any class for its complete 2026 eligibility description.

15Riders maximum
in each A Main
#1AMA plates
for champions
32Classes.
One championship.
A+BMain events
for every class
NEW FOR 2026 · AM OPEN SUPERCROSS

NOW AN
AMA PRO-AM.

$3,000PRO PURSE

A riders: earn AMA Motocross Pro-AM points at the Amateur Open of Supercross.

October 23–25, 2026
Arizona Cycle Park · Buckeye, Arizona

REGISTER YOUR RACER
2026 published class guide

FIND YOUR GATE.

32CLASSES SHOWN32 classes shown
Race weekend presented byAqua Pool Supply

ALL 32 CLASSES · OCTOBER 23–25, 2026

15
85cc

Super Mini 1 (12-15)

OCT 23–25
ELIGIBILITY

Modified 79-112cc 2S / 150cc 4S, ages 12-15. Maximum 19-inch front wheel and 16-inch rear wheel.

Always confirm final eligibility with event staff before registration.
16
85cc

Super Mini 2 (13-16)

OCT 23–25
ELIGIBILITY

Modified 79-112cc 2S / 150cc 4S, ages 13-16. Maximum 19-inch front wheel and 16-inch rear wheel.

Always confirm final eligibility with event staff before registration.
18
Schoolboy

Schoolboy 1 (12-17) B/C

OCT 23–25
ELIGIBILITY

Modified 86-125cc 2S / 75-150cc 4S, ages 12-17. Minimum 19-inch front wheel and 16-inch rear wheel. No A riders. Minimum age for 125cc, 150cc and Supermini is 12.

Always confirm final eligibility with event staff before registration.
19
Schoolboy

Schoolboy 2 (12-17) B/C

OCT 23–25
ELIGIBILITY

Modified 122-150cc 2S / 126-250cc 4S, ages 12-17. Minimum wheelbase 53 inches. No minicycle or Supermini. Minimum age for 250cc is 14. No A riders.

Always confirm final eligibility with event staff before registration.
20
Big Bike

125 C

OCT 23–25
ELIGIBILITY

Modified 125cc. No Mini or Supermini motorcycles.

Always confirm final eligibility with event staff before registration.
21
Big Bike

125 (12-17) B/C

OCT 23–25
ELIGIBILITY

Modified 125cc, ages 12-17. No Mini or Supermini motorcycles.

Always confirm final eligibility with event staff before registration.
22
Adult

College (18-24) A/B/C

OCT 23–25
ELIGIBILITY

Modified 122cc–Open, ages 18-24.

Always confirm final eligibility with event staff before registration.
24
Big Bike

250 C (12-17)

OCT 23–25
ELIGIBILITY

Modified 122-250cc C/Novice, ages 12-17. Minimum age for 250cc is 14.

Always confirm final eligibility with event staff before registration.
25
Big Bike

250 C

OCT 23–25
ELIGIBILITY

Modified 122-250cc C/Novice. Minimum age for 250cc is 14.

Always confirm final eligibility with event staff before registration.
26
Big Bike

250 B

OCT 23–25
ELIGIBILITY

Modified 122-250cc B/Intermediate. Minimum age for 250cc is 14.

Always confirm final eligibility with event staff before registration.
27
Pro Sport

250 Pro Sport

OCT 23–25
ELIGIBILITY

Modified 122-250cc A/Pro.

Always confirm final eligibility with event staff before registration.
28
Big Bike

Open C

OCT 23–25
ELIGIBILITY

Modified 122cc–Open C/Novice. Minimum age for 250cc is 14 and minimum age for 450cc is 16.

Always confirm final eligibility with event staff before registration.
29
Big Bike

Open B

OCT 23–25
ELIGIBILITY

Modified 122cc–Open. Minimum age for 250cc is 14 and minimum age for 450cc is 16.

Always confirm final eligibility with event staff before registration.
30
Pro Sport

Open Pro Sport

OCT 23–25
ELIGIBILITY

Modified 122cc–Open A.

Always confirm final eligibility with event staff before registration.
31
Adult

Junior (25+)

OCT 23–25
ELIGIBILITY

Modified 122cc–Open, ages 25 and up. Open skill level.

Always confirm final eligibility with event staff before registration.
32
Adult

Vet (30+)

OCT 23–25
ELIGIBILITY

Modified 122cc–Open, ages 30 and up. Open skill level.

Always confirm final eligibility with event staff before registration.
1
50cc

51cc Micro 1 (4-6) Shaft Drive Ltd

OCT 23–25
ELIGIBILITY

Single-speed automatic 0-51cc 2-stroke, oil injected. Maximum adjusted wheelbase 36 inches, wheel size 10 inches, seat height 22 inches and 12mm round intake. Yamaha PW50.

SUPPLEMENTAL: 2026 supplemental: KTM SX-E2, GASGAS MC-E2 and Husqvarna EE2 are eligible.

Always confirm final eligibility with event staff before registration.
2
50cc

51cc Micro (4-6) Special Limited

OCT 23–25
ELIGIBILITY

Single or multi-speed automatic 0-51cc 2S or 4S, ages 4-6. Maximum adjusted wheelbase 38 inches, wheel size 10 inches, seat height 22 inches and 13mm round intake.

SUPPLEMENTAL: Eligible models: Honda XR50/CRF50, KTM Mini Adventure/50 SX Mini, Suzuki JR50, Kawasaki KDX50, Yamaha TTR50/PW50, Cobra P3/PW3/GI, KTM SX-E2, GASGAS MC-E2 and Husqvarna EE2.

Always confirm final eligibility with event staff before registration.
3
50cc

Micro E (4-8) Limited

OCT 23–25
ELIGIBILITY

0-51cc battery, 1.5kWh. Maximum wheelbase 41 inches, wheel size 12 inches and seat height 28 inches. Retrofitted 12-inch wheels permitted. OEM parts required.

Always confirm final eligibility with event staff before registration.
4
50cc

51cc Micro 2 (4-6) Limited

OCT 23–25
ELIGIBILITY

0-51cc 2S, ages 4-6. Single-speed automatic. Maximum adjusted wheelbase 36 inches, wheel size 10 inches, seat height 24 inches and 14mm round intake.

Always confirm final eligibility with event staff before registration.
5
50cc

51cc Micro (5-7) Limited

OCT 23–25
ELIGIBILITY

0-51cc 2S, ages 5-7. Single-speed automatic. Maximum adjusted wheelbase 41 inches, wheel size 12 inches and 19mm round intake. Retrofitted 12-inch wheels permitted with OEM parts.

Always confirm final eligibility with event staff before registration.
6
50cc

51cc Micro 3 (7-8) Limited

OCT 23–25
ELIGIBILITY

0-51cc 2S, ages 7-8. Single-speed automatic. Maximum adjusted wheelbase 41 inches, wheel size 12 inches and 19mm round intake. Retrofitted 12-inch wheels permitted with OEM parts.

Always confirm final eligibility with event staff before registration.
7
50cc

51cc Micro (5-8)

OCT 23–25
ELIGIBILITY

Modified 0-61cc 2S, ages 5-8. Single-speed automatic. Maximum wheel size 12 inches. E3 and E5 bikes are also eligible.

Always confirm final eligibility with event staff before registration.
8
65cc

65cc (7-9)

OCT 23–25
ELIGIBILITY

Modified 59-65cc 2S, ages 7-9. 14-inch front wheel, 12-inch rear wheel and 45.5-inch wheelbase.

Always confirm final eligibility with event staff before registration.
9
65cc

65cc (10-11)

OCT 23–25
ELIGIBILITY

Modified 59-65cc 2S, ages 10-11. 14-inch front wheel, 12-inch rear wheel and 45.5-inch wheelbase.

Always confirm final eligibility with event staff before registration.
10
65cc

65cc (7-11)

OCT 23–25
ELIGIBILITY

Modified 59-65cc 2S, ages 7-11. 14-inch front wheel, 12-inch rear wheel and 45.5-inch wheelbase.

Always confirm final eligibility with event staff before registration.
11
85cc

85cc (9-12)

OCT 23–25
ELIGIBILITY

Modified 79-85cc 2S, ages 9-12. Maximum 17-inch front wheel and 14-inch rear wheel.

Always confirm final eligibility with event staff before registration.
12
85cc

Mini Sr 1 (12-14)

OCT 23–25
ELIGIBILITY

Modified 79-85cc 2S / 150cc 4S, ages 12-14. Maximum 19-inch front wheel and 16-inch rear wheel. Rider must be 12 to ride a Big Wheel.

Always confirm final eligibility with event staff before registration.
13
85cc

Mini Sr 2 (13-15)

OCT 23–25
ELIGIBILITY

Modified 79-85cc 2S / 150cc 4S, ages 13-15. Maximum 19-inch front wheel and 16-inch rear wheel.

Always confirm final eligibility with event staff before registration.
14
85cc

Mini (9-13)

OCT 23–25
ELIGIBILITY

Modified 79-85cc 2S / 150cc 4S, ages 9-13. Maximum 19-inch front wheel and 16-inch rear wheel. Rider must be 12 for a Big Wheel or 150.

Always confirm final eligibility with event staff before registration.
17
Women & Girls

Girls (9-14)

OCT 23–25
ELIGIBILITY

Modified 79-112cc 2S / 75-150cc 4S. Maximum 19-inch front wheel and 16-inch rear wheel. Rider must be 12 for Big Wheel, Supermini or 150.

Always confirm final eligibility with event staff before registration.
23
Women & Girls

Women (12+)

OCT 23–25
ELIGIBILITY

Modified 99-250cc 2S / 250cc 4S, ages 12 and up. Minimum 19-inch front wheel and 16-inch rear wheel. Minimum age for 250cc is 14; minimum age for 125cc, 150cc and Supermini is 12.

Always confirm final eligibility with event staff before registration.
American Motorcyclist Association
Official rules & regulations

KNOW BEFORE YOU LINE UP.

Class descriptions follow the published 2026 AM Open guide. Review current AMA competition rules and confirm final eligibility with event staff before registration.

View AMA rules ↗
AZ Open Motocross Championship
Also from Arizona Cycle ParkTHE 2026
AZ OPEN.
DECEMBER03–062026 · BUCKEYE, ARIZONA
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