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AMA Featured Event42 classes / one championship
Classes
Search by bike, age, displacement or skill level and open any class for its complete eligibility description.
AMA Featured EventKNOW YOUR
EFFECTIVE DATE.
Class eligibility is determined using the date shown for your class category.
OFFICIAL RULES & REGULATIONSAMA MOTOCROSS
VIEW AMA RULES ↗AMA MOTOCROSS
RULEBOOK
Review the current AMA motocross rules before you line up.
2026LTD
REQUIRED READING FOR LIMITED CLASSESLIMITED CLASS
OPEN THE PDF ↗LIMITED CLASS
CLARIFICATION CHART
Check approved equipment and class specifications before registration.
2026 PUBLISHED CLASS GUIDE
44 CLASSES SHOWNFIND YOUR GATE.
1Micro51cc Micro 1 (4-6) Shaft Drive LtdModified TrackLimited+
Modified Track. Single-speed automatic 0-51cc 2-stroke, oil injected. Maximum adjusted wheelbase 36 in, wheel size 10 in, seat height 22 in and 12mm round intake. Yamaha PW50. Also eligible: KTM SX-E2, GASGAS MC-E2 and Husqvarna EE2.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.2Micro51cc Micro (4-6) Special LimitedModified TrackLimited+
Modified Track. Single or multi-speed automatic 0-51cc 2S or 4S. Maximum adjusted wheelbase 38 in, wheel size 10 in, seat height 22 in and 13mm round intake. Eligible models include Honda XR50/CRF50, KTM Mini Adventure/50 SX Mini, Suzuki JR50, Kawasaki KDX50, Yamaha TTR50/PW50 and Cobra P3/PW3/GI. Also eligible: KTM SX-E2, GASGAS MC-E2 and Husqvarna EE2.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗VIEW 51CC KTM DETAIL CHART ↗Always confirm final eligibility with event staff before registration.3MicroMicro E (4-6) LimitedElectricModified Track+
Modified Track. 0-51cc battery, 1.5kWh. Maximum wheelbase 41 in, wheel size 12 in and seat height 28 in. Retrofitted 12-inch wheels permitted; OEM parts required.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.3.1MicroMicro E (4-8) LimitedElectricFull Track+
Full Track. 0-51cc battery, 1.5kWh. Maximum wheelbase 41 in, wheel size 12 in and seat height 28 in. Retrofitted 12-inch wheels permitted; OEM parts required.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.4Micro51cc Micro 2 (4-6) LimitedLimited+
0-51cc 2S, ages 4-6. Single-speed automatic. Maximum adjusted wheelbase 36 in, wheel size 10 in, seat height 24 in and 14mm round intake.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.4.1Micro51cc Micro (5-7) LimitedLimited+
0-51cc 2S, ages 5-7. Single-speed automatic. Maximum adjusted wheelbase 41 in, wheel size 12 in and 19mm round intake. Retrofitted 12-inch wheels permitted with OEM parts.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.5Micro51cc Micro 3 (7-8) LimitedLimited+
0-51cc 2S, ages 7-8. Single-speed automatic. Maximum adjusted wheelbase 41 in, wheel size 12 in and 19mm round intake. Retrofitted 12-inch wheels permitted with OEM parts.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.7Micro51cc Micro (5-8)Modified+
0-61cc 2S, ages 5-8. Single-speed automatic. Maximum wheel size 12 in. E3 and E5 bikes are also eligible.
Always confirm final eligibility with event staff before registration.865cc65cc (7-9) LimitedLimited+
59-65cc 2S, ages 7-9. 14-inch front wheel, 12-inch rear wheel and 45.5-inch wheelbase.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.965cc65cc (7-9)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.1065cc65cc (10-11) LimitedLimited+
59-65cc 2S, ages 10-11. 14-inch front wheel, 12-inch rear wheel and 45.5-inch wheelbase.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.1165cc65cc (10-11)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.1265cc65cc (7-11)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.13Mini85cc (9-12) LimitedLimited+
79-85cc 2S or 150cc 4S, ages 9-12. 17-inch front, 14-inch rear and 51.5-inch wheelbase. Rider must be 12 to ride a 150.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.14Mini85cc (9-12)Modified+
79-85cc 2S or 150cc 4S, ages 9-12. Maximum 17-inch front and 14-inch rear wheels. Rider must be 12 to ride a 150.
Always confirm final eligibility with event staff before registration.15MiniMini Sr 1 (12-14)Modified+
79-85cc 2S or 150cc 4S, ages 12-14. Maximum 19-inch front, 16-inch rear and 52.5-inch wheelbase.
Always confirm final eligibility with event staff before registration.16MiniMini Sr 2 (13-15)Modified+
79-85cc 2S or 150cc 4S, ages 13-15. Maximum 19-inch front, 16-inch rear and 52.5-inch wheelbase.
Always confirm final eligibility with event staff before registration.17MiniMini (9-13)Modified+
79-85cc 2S or 150cc 4S, ages 9-13. Maximum 19-inch front and 16-inch rear wheels. Rider must be 12 to ride a 150.
Always confirm final eligibility with event staff before registration.18MiniSuper Mini 1 (12-15)Modified+
79-112cc 2S or 150cc 4S, ages 12-15. 19-inch front, 16-inch rear and 52.5-inch wheelbase.
Always confirm final eligibility with event staff before registration.19MiniSuper Mini 2 (13-16)Modified+
79-112cc 2S or 150cc 4S, ages 13-16. 19-inch front, 16-inch rear and 52.5-inch wheelbase.
Always confirm final eligibility with event staff before registration.20SchoolboySchoolboy 1 (12-17) B/CB/CModified+
86-125cc 2S or 75-150cc 4S, ages 12-17. Minimum 19-inch front and 16-inch rear wheels. No A riders. Minimum age for 125cc, 150cc and Supermini is 12.
Always confirm final eligibility with event staff before registration.21SchoolboySchoolboy 2 (12-17) B/CB/CModified+
122-150cc 2S or 126-250cc 4S, ages 12-17. Minimum wheelbase 53 in. No minicycle or Supermini. Minimum age for 250cc is 14. No A riders.
Always confirm final eligibility with event staff before registration.22Big Bike125 CCModified+
125cc. No Mini or Supermini.
Always confirm final eligibility with event staff before registration.23Schoolboy125 (12-17) B/CB/CModified+
125cc, ages 12-17. No Mini or Supermini.
Always confirm final eligibility with event staff before registration.24AdultCollege (18-24) A/B/CA/B/CModified+
122cc-Open, ages 18-24.
Always confirm final eligibility with event staff before registration.24.1Women & GirlsGirls 65cc-85cc (9-13)Modified+
65-85cc 2S only. 17-inch front, 14-inch rear and 51.5-inch wheelbase.
Always confirm final eligibility with event staff before registration.25Women & GirlsGirls (9-14)Modified+
79-112cc 2S or 75-150cc 4S. Maximum 19-inch front and 16-inch rear wheels. Minimum age for Supermini and 150cc is 12.
Always confirm final eligibility with event staff before registration.26Women & GirlsWomen (12+)Modified+
99-250cc 2S or 250cc 4S, ages 12+. Minimum 19-inch front and 16-inch rear wheels. WMX top five are not eligible. Minimum age for 250cc is 14.
Always confirm final eligibility with event staff before registration.27Big BikeTwo-Stroke (12+) B/CB/CTwo-Stroke+
122-250cc, ages 12+. Minimum age for 250cc is 14.
Always confirm final eligibility with event staff before registration.28Big Bike250 C (12-17) LimitedCLimited+
122-250cc C/Novice, ages 12-17. Minimum age for 250cc is 14.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.29Big Bike250 C LimitedCLimited+
122-250cc C/Novice. Minimum age for 250cc is 14.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.30Big Bike250 CCModified+
122-250cc C/Novice. Minimum age for 250cc is 14.
Always confirm final eligibility with event staff before registration.31Big Bike250 B LimitedBLimited+
122-250cc B/Intermediate. Minimum age for 250cc is 14.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.32Big Bike250 BBModified+
122-250cc B/Intermediate. Minimum age for 250cc is 14.
Always confirm final eligibility with event staff before registration.33Pro Sport250 Pro SportDouble PointsSX Points+
122-250cc A/Pro. Double Pro-Am points and Supercross Futures points.
Always confirm final eligibility with event staff before registration.34Big BikeOpen C LimitedCLimited+
122cc-Open C/Novice. Minimum age for 250cc is 14 and 450cc is 16.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.35Big BikeOpen CCModified+
122cc-Open C/Novice. Minimum age for 250cc is 14 and 450cc is 16.
Always confirm final eligibility with event staff before registration.36Big BikeOpen B LimitedBLimited+
122cc-Open. Minimum age for 250cc is 14 and 450cc is 16.
VIEW 2026 LIMITED CLASS CLARIFICATION CHART ↗Always confirm final eligibility with event staff before registration.37Big BikeOpen BBModified+
122cc-Open. Minimum age for 250cc is 14 and 450cc is 16.
Always confirm final eligibility with event staff before registration.38Pro SportOpen Pro SportDouble PointsModified+
122cc-Open A. Double Pro-Am points.
Always confirm final eligibility with event staff before registration.39VetJunior (25+)Sunday Only2 Moto+
122cc-Open, ages 25+. Open skill level. Sunday only, two-moto format.
Always confirm final eligibility with event staff before registration.40VetVet (30+)Sunday Only2 Moto+
122cc-Open, ages 30+. Open skill level. Sunday only, two-moto format.
Always confirm final eligibility with event staff before registration.41VetSenior (40+)Sunday Only2 Moto+
122cc-Open, ages 40+. Open skill level. Sunday only, two-moto format.
Always confirm final eligibility with event staff before registration.42VetMasters (50+)Sunday Only2 Moto+
122cc-Open, ages 50+. Open skill level. Sunday only, two-moto format.
Always confirm final eligibility with event staff before registration.Built from the supplied “2025 AZ Open Classes & Descriptions” document. The document states that 2026 motorcycles are eligible for the 2025 AZ Open. Final 2026 classes remain subject to confirmation.