| Ober | Markus | Deutschland |
| Rang | Jahr | Marke | Klasse | Resultate |
|
24 |
1999 | HON | 500 cc | E1 15 - F 14 - I1 15 - E2 13 |
| O'Brien | Phil | Großbritannien |
| Rang | Jahr | Marke | Klasse | Resultate |
|
38 |
1969 | MAT | 500 cc | DD 6 |
| Offenstadt | Eric | Frankreich |
| Rang | Jahr | Marke | Klasse | Resultate |
|
14 |
1970 | KAW | 500 cc | F 9 - DD 7 - SF 4 |
|
40 |
1971 | KAW | 350 cc | S 8 |
|
6 |
1971 | KAW | 500 cc | A 3 - B 2 - E 3 |
|
29 |
1972 | KAW | 500 cc | B 6 |
|
11 |
1973 | KAW | 500 cc | F 7 - NL 9 - CS 4 - SF 8 |
| Ogura | Naoto | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
31 |
1997 | YAM | 250 cc | JP 13 |
| Ohishi | Keiji | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
17 |
1992 | SUZ | 500 cc | JP 6 |
| Ohsaki | Nobuyuki | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
22 |
1998 | YAM | 125 cc | JP 5 |
|
31 |
2000 | YAM | 250 cc | J1 10 |
|
27 |
2001 | YAM | 250 cc | J2 10 |
| Ohligschläger | Adolf | Deutschland |
| Rang | Jahr | Marke | Klasse | Resultate |
|
12 |
1969 | YAM | 350 cc | E 7 - CS 9 - SF 6 - YU 6 |
|
45 |
1970 | YAM | 250 cc | SF 10 |
|
36 |
1971 | YAM | 250 cc | CS 7 |
|
36 |
1971 | YAM | 350 cc | CS 7 |
| Oikawa | Seijin | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
| 30 | 2006 | YAM | 250 cc | JP 13 |
| 26 | 2007 | YAM | 250 cc | JP 12 |
| Okada | Tadayuki | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
| 28 | 1989 | HON | 250 cc | JP 6 |
| 13 | 1992 | HON | 250 cc | JP 2 |
| 8 | 1993 | HON | 250 cc | AU 4 - MA 3 - JP 2 - E 7 - EU 2 - SM 6 - GB 5 - CS 11 - I 7 - US 9 |
| 2 | 1994 | HON | 250 cc | AU 5 - MA 2 - JP 1 - E 3 - A 4 - D 5 - NL 2 - I 7 - F 9 - GB 2 - CS 5 - US 4 - RA 1 - EU 4 |
| 4 | 1995 | HON | 250 cc | MA 3 - E 6 - D 3 - I 5 - NL 3 - F 3 - GB 8 - CS 7 - BR 3 - RA 7 - CT 7 |
| 7 | 1996 | HON | 500 cc | JP 4 - E 3 - I 7 - NL 13 - D 7 - GB 4 - A 11 - CS 7 - SM 3 - CT 5 - BR 8 - AU 2 |
| 2 | 1997 | HON | 500 cc | MA 10 - JP 3 - E 3 - A 2 - F 3 - NL 12 - I 5 - D 2 - BR 2 - GB 2 - E 6 - IN 1 - AU 4 |
| 8 | 1998 | HON | 500 cc | JP 2 - E 7 - NL 8 - CZ 4 - SM 7 - CT 2 - AU 9 - RA 2 |
| 3 | 1999 | HON | 500 cc | MA 5 - JP 15 - E1 4 - F 9 - I1 3 - E2 2 - NL 1 - GB 2 - CZ 1 - I2 4 - E3 4 - AU 1 - SA 4 - BR 7 |
| 11 | 2000 | HON | 500 cc | MA 6 - J1 3 - E1 10 - F 14 - I 8 - E2 15 - NL 11 - GB 10 - D 5 - CZ 10 - P 7 - E3 9 - BR 9 - J2 10 - AU 9 |
| Olive | Joan | Spanien |
| Rang | Jahr | Marke | Klasse | Resultate |
| 19 | 2001 | HON | 125 cc | E1 14 - E2 8 - GB 14 - D 15 - CZ 14 - E3 10 - J2 12 - MA 12 - BR 11 |
| 12 | 2002 | HON | 125 cc | J1 13 - E1 9 - E2 6 - NL 3 - GB 6 - D 11 - J2 8 - MA 13 - AU 9 - E3 9 |
| 12 | 2003 | APR | 250 cc | J1 13 - E1 10 - F 10 - I 10 - E2 10 - BR 7 - MA 14 |
| 19 | 2004 | APR | 250 cc | F 10 - I 11 - D 13 - GB 11 - CZ 15 - Q 10 - E3 15 |
| 14 | 2005 | APR | 125 cc | E1 8 - CHI 14 - I 3 - NL 13 - GB 8 - D 8 - Q 11 - AU 15 - TU 9 - E3 14 |
| 10 | 2006 | APR | 125 cc | E1 9 - TU 5 - CHI 14 - F 7 - I 13 - E2 9 - NL 12 - GB 6 - D 9 - CZ 8 - MAL 5 - AUS 10 |
| 8 | 2007 | APR | 125 cc | Q 11 - E1 8 - TU 2 - F 5 - E2 8 - GB 5 - D 11 - CZ 12 - I2 12 - P 5 - J 5 - AUS 2 - MAL 4 |
| Oliver | Lucas | Spanien |
| Rang | Jahr | Marke | Klasse | Resultate |
|
25 |
1999 | YAM | 250 cc | E2 14 - E3 12 |
|
29 |
2000 | YAM | 250 cc | NL 13 - GB 12 |
| Oliver | Richard | USA |
| Rang | Jahr | Marke | Klasse | Resultate |
|
39 |
1990 | YAM | 250 cc | US 13 |
|
23 |
1991 | YAM | 500 cc | US 11 |
| Ollavaria | Raffaele | Venezuela |
| Rang | Jahr | Marke | Klasse | Resultate |
|
27 |
1977 | YAM | 125 cc | YV 7 |
| Olsson | Hakan | Schweden |
| Rang | Jahr | Marke | Klasse | Resultate |
|
20 |
1984 | SAL | 125 cc | S 8 |
|
16 |
1985 | SAL | 125 cc | A 8 - F 9 |
|
18 |
1986 | SAL | 125 cc | E 10 - GB 10 - S 8 |
|
22 |
1987 | MBA | 125 cc | SM 9 |
| Olsson | Roland | Schweden |
| Rang | Jahr | Marke | Klasse | Resultate |
|
30 |
1970 | YAM | 250 cc | SF 6 |
|
41 |
1971 | YAM | 125 cc | S 10 |
|
47 |
1972 | YAM | 125 cc | SF 10 |
|
27 |
1972 | YAM | 250 cc | SF 7 |
|
37 |
1974 | YAM | 125 cc | S 9 |
| Ono | Masafumi | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
18 |
1993 | HON | 125 cc | AU 4 - MA 5 - JP 13 |
| Oosting | Rudi | Holland |
| Rang | Jahr | Marke | Klasse | Resultate |
|
25 |
1979 | KRE | 50 cc | B 9 |
| Orban | Jean-Philippe | Belgien |
| Rang | Jahr | Marke | Klasse | Resultate |
|
28 |
1977 | SUZ | 500 cc | SF 9 |
|
25 |
1978 | SUZ | 500 cc | F 8 |
| O'Rourke | Mike | Großbritannien |
| Rang | Jahr | Marke | Klasse | Resultate |
|
13 |
1952 | AJS | 350 cc | UL 6 |
|
13 |
1957 | NOR | 500 cc | B 4 |
|
15 |
1958 | NOR | 350 cc | S 6 |
| Öttl | Peter | Deutschland |
| Rang | Jahr | Marke | Klasse | Resultate |
|
20 |
1987 | KRA | 80 cc | NL 9 - SM 10 |
|
5 |
1988 | KRA | 80 cc | E 5 - P 5 - I 7 - NL 2 - B 2 |
|
3 |
1989 | KRA | 80 cc | E 3 - D 1 - YU 1 - NL 1 |
|
9 |
1991 | ROT | 125 cc | A 10 - EU 3 - NL 5 - GB 3 - SM 1 |
|
14 |
1992 | ROT | 125 cc | I 4 |
|
10 |
1993 | APR | 125 cc | E 10 - D 8 - NL 6 - SM 8 - GB 9 - CS 7 - I 3 |
|
5 |
1994 | APR | 125 cc | AU 2 - JP 4 - E 2 - A 4 - D 4 - I 4 - F 4 - GB 3 - US 3 - RA 13 - EU 2 |
|
10 |
1995 | APR | 125 cc | JP 11 - E 4 - I 4 - NL 2 - F 3 - RA 7 |
|
11 |
1996 | APR | 125 cc | MA 3 - IN 3 - E 11 - I 1 - D 6 - GB 11 - A 5 - CS 7 |
|
23 |
1997 | APR | 125 cc | E 6 - I 15 |
| Ottobre | Massimo | Italien |
| Rang | Jahr | Marke | Klasse | Resultate |
|
30 |
1996 | APR | 250 cc | I 11 - NL 15 |
| Özelt | Josef | Österreich |
| Rang | Jahr | Marke | Klasse | Resultate |
|
46 |
1972 | MAT | 500 cc | DD 10 |
| Stand nach der Saison 2007 |