Common OCS motorcycle classes (adjust per event)

1. Vintage (pre-1970)
2. Classic (1970–1989)
3. Modern (1990–2009)
4. Contemporary (2010+)
5. American V-Twin/Cruiser
6. Sportbike
7. Standard/Naked
8. Touring/Baggers
9. Adventure/Dual-Sport/Supermoto
10. Dirt/MX (display)
11. Trike/Sidecar
12. Survivor/Original (≥75% factory)
13. Mild Custom
14. Radical Custom
15. Electric

Stock vs. Custom

• Stock/Survivor: authenticity matters (factory-correct parts/finishes).
• Custom/Radical: reward craftsmanship, engineering, finish, theme cohesion.

Documentation judges may accept

• Owner’s manual, parts book pages, period ads, factory brochures, VIN/engine code references, build sheets, receipts.

Verbal claims may be considered but written proof wins ties.