All Classes 01. Open Pro Sport 02. 250 Pro Sport 03. WMX 04. 250 B 05. 250 B Limited 06. 250 C 07. 250 C Limited 08. 250 C Jr. (12-17) Limited 09. 450 B 10. 450 B Limited 11. 450 C 12. 125 C 13. Schoolboy 2 (12-17) B/C 14. College (18-24)** 15. Junior (25+) 16. Vet (30+)** 17. Senior (40+) 18. Senior (45+)** 19. Masters (50+) 20. Micro-E (4-7) Limited 21. Micro 1(4-6) Shaft Dr LTD 22. Micro 2 (4-6) Limited 23. Micro 3 (7-8) Limited 24. 65cc (7-9) Limited 25. 65cc (7-9) 26. 65cc (10-11) Limited 27. 65cc (10-11) 28. 85cc (10-12) Limited 29. 85cc (10-12) 30. Mini Sr 1 (12-14) 31. Mini Sr 2 (13-15) 32. Supermini 1 (12-15) 33. Supermini 2 (13-16) 34. 125 Jr. (12-17) B/C 35. Schoolboy 1 (12-17) B/C