All available race results Ko Zomer
| Date | Race | Rank |
| 11/04 | Ster van Zwolle | 5 |
Rider information for 1964
| Rank | 1658 |
| Score | 0 |
| Name | Ko ZOMER |
| Country | Netherlands |
| Team | Individual |
| Date | Race | Rank |
| 11/04 | Ster van Zwolle | 5 |
| Rank | 1658 |
| Score | 0 |
| Name | Ko ZOMER |
| Country | Netherlands |
| Team | Individual |