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