Debutants
Gianni Motta is the youngest debutant in World Championships in 1964. There are 24 debutants.
| # | Rider | Team | Age |
|---|---|---|---|
| 1 | MOTTA Gianni | Italy | 21y + 177d |
| 2 | WEBER Werner | Switzerland | 21y + 351d |
| 3 | HAGMANN Robert | Switzerland | 22y + 157d |
| 4 | SELS Ward | Belgium | 23y + 10d |
| 5 | BÖLKE Winfried | Germany | 23y + 104d |
| 6 | DEN HARTOG Arie | Netherlands | 23y + 136d |
| 7 | BOCKLANT Willy | Belgium | 23y + 224d |
| 8 | URIONA Valentin | Spain | 23y + 313d |
| 9 | VANCONINGSLOO Georges | Belgium | 23y + 315d |
| 10 | HOBAN Barry | Great Britain | 24y + 214d |
| 11 | HABERLI Manfred | Switzerland | 24y + 272d |
| 12 | MONTY Willy | Belgium | 24y + 331d |
| 13 | VEALE Neville | Australia | 25y + 249d |
| 14 | HAAST Cees | Netherlands | 25y + 259d |
| 15 | TÜLLER Günter | Germany | 26y + 156d |
| 16 | KUNDE Karl-Heinz | Germany | 26y + 244d |
| 17 | GABICA Francisco | Spain | 26y + 250d |
| 18 | MEALLI Bruno | Italy | 26y + 291d |
| 19 | GROUSSARD Georges | France | 27y + 168d |
| 20 | NOVAK Anatole | France | 27y + 207d |
| 21 | ALTIG Willi | Germany | 29y + 233d |
| 22 | JIMÉNEZ Julio | Spain | 29y + 314d |
| 23 | FOUCHER André | France | 30y + 340d |
| 24 | SORGELOOS Edgard | Belgium | 33y + 267d |