Debutants
Roy Knickman is the youngest debutant in World Championships in 1986. There are 50 debutants.
| # | Rider | Team | Age |
|---|---|---|---|
| 1 | KNICKMAN Roy | United States | 21y + 75d |
| 2 | STEVENHAAGEN Peter | Netherlands | 21y + 135d |
| 3 | SØRENSEN Rolf | Denmark | 21y + 139d |
| 4 | TEGSTRÖM Jonas | Sweden | 21y + 248d |
| 5 | KUUM Jaanus | Norway | 21y + 339d |
| 6 | BRYKT Stefan | Sweden | 22y + 54d |
| 7 | BREUKINK Erik | Netherlands | 22y + 158d |
| 8 | SKIBBY Jesper | Denmark | 22y + 169d |
| 9 | RICHARD Pascal | Switzerland | 22y + 174d |
| 10 | ALCALÁ Raúl | Mexico | 22y + 187d |
| 11 | BUGNO Gianni | Italy | 22y + 204d |
| 12 | MORA Néstor Oswaldo | Colombia | 22y + 351d |
| 13 | JOHO Stephan | Switzerland | 23y + 2d |
| 14 | POELS Twan | Netherlands | 23y + 41d |
| 15 | PENSEC Ronan | France | 23y + 58d |
| 16 | MARIE Thierry | France | 23y + 73d |
| 17 | BOMANS Carlo | Belgium | 23y + 88d |
| 18 | MILLER Paul | Australia | 23y + 206d |
| 19 | HERMANS Mathieu | Netherlands | 23y + 240d |
| 20 | SHINDE Prakash | India | 23y + 248d |
| 21 | COLAGÈ Stefano | Italy | 24y + 60d |
| 22 | BÄCKMANN Björn | Sweden | 24y + 80d |
| 23 | HILSE Peter | Germany | 24y + 121d |
| 24 | PELIER Joël | France | 24y + 167d |
| 25 | GUTIÉRREZ Alfonso | Spain | 24y + 293d |
| 26 | PIASECKI Lech | Poland | 24y + 297d |
| 27 | CHRISTIANSSON Per Mikael | Sweden | 25y + 77d |
| 28 | HERRERA Luis Alberto | Colombia | 25y + 125d |
| 29 | STIEDA Alex | Canada | 25y + 146d |
| 30 | PREHN Thomas | United States | 25y + 158d |
| 31 | DE WOLF Dirk | Belgium | 25y + 233d |
| 32 | ROGERS Thurlow | United States | 26y + 183d |
| 33 | BONTEMPI Guido | Italy | 26y + 237d |
| 34 | MCFARLANE David | Australia | 27y + 6d |
| 35 | ARANGO Rogelio | Colombia | 27y + 112d |
| 36 | JOOSTEMA Ron | Canada | 27y + 183d |
| 37 | PIERCE Jeff | United States | 28y + 9d |
| 38 | NEVENS Jan | Belgium | 28y + 11d |
| 39 | TOLOSA Rafael | Colombia | 28y + 14d |
| 40 | BAGOT Jean-Claude | France | 28y + 181d |
| 41 | ACEVEDO Rafael Antonio | Colombia | 29y + 125d |
| 42 | DEVOS Hendrik | Belgium | 30y + 328d |
| 43 | WALTON Hugh | Canada | 31y + 99d |
| 44 | MARCUSSEN Michael | Denmark | 31y + 240d |
| 45 | VIGNERON Alain | France | 32y + 5d |
| 46 | VENN Laurie | Australia | 33y + 13d |
| 47 | LÓPEZ José Alfonso | Colombia | 34y + 76d |
| 48 | HUNTER Alan | Australia | |
| 49 | SAITO Masaru | Japan | |
| 50 | NISHIKAWA Tatsuo | Japan |