| Yamada | Kazuya | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
35 |
1989 | HON | 125 cc | JP 10 |
| Yamaguchi | Tetsuya | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
22 |
1999 | HON | 250 cc | JP 6 |
| Yamakawa | Yousuke | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
37 |
1991 | HON | 125 cc | JP 13 |
| Yamamoto | Takehiro | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
25 |
1987 | YAM | 250 cc | JP 10 |
|
19 |
1995 | HON | 125 cc | MA 6 - D 13 - I 14 - GB 10 - BR 13 - RA 11 |
| Yamamoto | Youichi | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
45 |
1988 | HON | 250 cc | JP 14 |
| Yamashita | Morisuka | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
X |
1963 | HON | 350 cc | JP (2) |
|
13 |
1964 | HON | 350 cc | JP 4 |
|
21 |
1965 | HON | 250 cc | JP 4 |
|
16 |
1965 | HON | 350 cc | JP 4 |
| Yamashita | Kazuaki | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
32 |
1989 | HON | 125 cc | JP 8 |
| Yamazaki | Fuyuki | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
32 |
1990 | HON | 125 cc | JP 11 |
| Yatsushiro | Shunji | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
9 |
1987 | HON | 500 cc | E 8 - A 7 - YU 8 - F 8 - CS 6 - SM 5 - P 8 |
|
13 |
1986 | HON | 500 cc | A 7 - YU 8 |
|
13 |
1988 | HON | 500 cc | JP 10 - E 9 - I 8 - D 10 - A 7 - NL 11 - B 9 - YU 7 |
|
41 |
1989 | HON | 500 cc | JP 13 |
| Yokoe | Ryuji | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
| 34 | 2002 | YAM | 250 cc | J2 14 |
| 25 | 2006 | YAM | 250 cc | JP 8 |
| Yorino | A | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
| 17 | 1967 | YAM | 350 cc | JP 6 |
| Yoshida | Kenichi | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
| 26 | 1989 | HON | 125 cc | JP 5 |
| Yoshikawa | Wataru | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
| 25 | 2002 | YAM | GP 1 | J2 12 |
| Young | Lewis | Großbritannien |
| Rang | Jahr | Marke | Klasse | Resultate |
|
20 |
1964 | MAT | 500 cc | SF 6 |
|
21 |
1965 | AJS | 350 cc | SF 5 |
|
25 |
1965 | MAT | 500 cc | SF 6 |
|
15 |
1966 | MAT | 500 cc | D 5 - SF 6 |
|
17 |
1969 | AER | 350 cc | SF 8 - I 9 - YU 5 |
|
15 |
1969 | MAT | 500 cc | SF 5 - YU 4 |
|
28 |
1970 | HON | 500 cc | B 5 |
| Young | Paul | Australien |
| Rang | Jahr | Marke | Klasse | Resultate |
|
28 |
1996 | YAM | 500 cc | CT 14 |
| Yuzawa | Yasuharu | Japan |
| Rang | Jahr | Marke | Klasse | Resultate |
|
21 |
1965 | HON | 125 cc | JP 5 |
|
15 |
1966 | YAM | 125 cc | JP 6 |
| Yuzi | Sharol | Malaysia |
| Rang | Jahr | Marke | Klasse | Resultate |
|
18 |
2000 | YAM | 250 cc | F 13 - I 11 - CZ 12 - P 10 - E3 14 - J2 12 |
|
15 |
2001 | YAM | 250 cc | SA 11 - F 15 - I 9 - E2 12 - GB 10 - D 11 - P 10 - E3 12 - AU 10 |
| 15 | 2002 | YAM | 250 cc | E1 13 - F 13 - I 9 - E2 8 - NL 10 - GB 10 - D 11 - BR 9 - MA 9 - AU 15 - E3 11 |
| Stand nach der Saison 2007 |