• Acerbis

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  •    CLASSES
  • 50CC Air Cooled

    PW50, TTR50, JR50, CRF50, E-2

  • 50cc Air Cooled

    PW50, TTR50, JR50, CRF50, E-2

  • 50cc Jr (Age 4-6 yrs)

    51cc 2 stroke/51cc 4 stroke. Single-Speed automatic.10 inch max wheel size.***E2 ALLOWED*

  • 50cc- Sr. (Age 7-8 yrs)

    51cc 2 stroke/51cc 4 stroke. Single-Speed automatic.12 inch max wheel size.***NO ELECTRIC 50’S ALLOWED*

  • Micro Open (Age 4-8 yrs)

    51cc 2 stroke/51cc 4 stroke, E bikes. Single-Speed automatic.12 inch max wheel size. E-bikes are allowed.***E2,E3,E5 ALLOWED***

  • 50 E-BIKE OPEN (4-8 Yrs)

    Max Front Wheel: 12’; Max Seat Height: 28”, Max Battery Energy: 1.5kwh. ***E2, E3, E5 ALLOWED***

  • 65cc Jr. (Age 7-9 yrs)

    59-65cc 2stroke and 4 stroke. Minimum wheel size 12 inches, Max Front wheel size 14 inches.

  • 65cc Sr. (Age 10-11 yrs)

    59-65cc 2stroke and 4 stroke. Min. wheel size 12 inches, Max Front wheel size 14 inches.

  • 65cc Open (Age 7-11 yrs)

    59-65cc 2stroke and 4 stroke. Min. wheel size 12 inches, Max Front wheel size 14 inches.

  • 85cc jr. (Age 9-11 yrs)

    85cc stroke/150cc stroke. Max Front Wheel size 17 inches, Max Rear wheel size 14 inches.

  • 85cc Sr. (Age 12-15 yrs)

    85cc 2 stroke/150cc 4stroke. Max Front Wheel size19 inches, Max Rear wheel size 16 inches.

  • 85cc Open (Age 9-15)

    85cc 2stroke/150cc 4stroke.Max Front Wheel size 19 inches, Max Rear wheel size 16 inches.

  • Supermini (Age 9-16)

    79-112cc 2stroke/79-150cc 4stroke Max Front Wheel size19 inches Max Rear wheel size 16 inches.

  • Girls Jr. (Age 7-11 yrs)

    59cc-85cc 2 stroke or 4 stroke. Max Front Wheel size 17 inches, Max Rear wheel size 14 inches.

  • 125cc OPEN (Age 12+ yrs)

    125CC 2stroke. Min front wheel size 19 inches, Min Rear Wheel Size 16 inches

  • 250cc Beginner (Age 12+ yrs)

    122cc-250cc 2 or 4stroke. Riders Cannot have raced prior to 2023. Riders that received an end of year award in 2024 from MO State MX are ineligible. Must be 14 to ride 250cc.

  • 250cc C (Age 12+ yrs)

    122cc-250cc 2 or 4stroke. Must be 14 to ride 250cc

  • 250cc B (Age 12+ yrs)

    122cc-250cc 2 or 4stroke. Must be 14 to ride 250cc

  • 250cc PRO (Age 12+ yrs)

    122cc-250cc 2 or 4 stroke. Must be 14 to ride 250cc.

  • 450 Beginner (Age 14+)

    122cc-Open 2 or 4 stroke. Riders Cannot have raced prior to 2023. Riders that received an end of year award in 2024 from MO State MX are ineligible. Must be 14 to ride 250cc, Must be 16 to ride 250+

  • 450 B (Age 14+)

    122cc-open 2 or 4stroke. Must be 14 to ride 250, Must be 16 to ride 250+

  • 450 C (Age 14+)

    122cc-Open 2 or 4stroke. Must be 14 to ride 250, Must be 16 to ride 250+

  • Open B/C(BBO) (Age 14+)

    122cc-Open 2 or 4stroke. Must be 14 to ride 250, Must be 16 to ride 250+

  • 450 A (Age 14+)

    122cc-Open 2 or 4stroke. Must be 14 to ride 250, Must be 16 to ride 250+

  • Schoolboy (Age 12-17 yrs)

    86-150cc 2 stroke/126cc-250cc 4 stroke. Minimum Front wheel size 19 inches, Minimum Rear Wheel Size 16inches.

  • College (14-24)

    122cc-Open 2 or 4stroke. Must be 14 to ride 250, Must be 16 to ride 250+

  • Plus 25 (Age 25+ yrs)

    122cc-Open 2 or 4stroke.

  • Plus 30 B/C (Age 30+ yrs)

    122cc-Open 2 or 4 stroke.

  • Plus 35 (Age 35+ yrs)

    122cc-Open 2 or 4 stroke.

  • Plus 40 (Age 40+ yrs)

    122cc-Open 2 or 4 stroke.

  • Plus 45 (Age 45+ yrs)

    122cc-Open 2 or 4 stroke.

  • Plus 50 (Age 50+ yrs)

    122cc-Open 2 or 4 stroke.

  • Women (Age 12+ yrs)

    86cc-250cc. Min front wheel size 19 inches, Min Rear Wheel Size 16 inches.