| Adrian Käser | |
| Nationality: |  Switzerland |
| Sa Active Years: | 1988–1989 1991 – 1996 |
| Sa Championships: | (4) 1993, 1994, 1995, 1996 |
| Sa Last Season: | 1996 |
| Sa Last Position: | 1st |
| Sa Last Points: | 262 |
| Sa Race Starts: | 147 |
| Sa Race Wins: | 22 |
| Sa Podiums: | 51 |
| Sa Total Points: | 1515 |
Adrian Käser is a retired Swiss sidecarcross passenger and four times World Champion.
He has also won the Swiss national sidecarcross championship five times, in 1991 and from 1993 to 1996. After his last world championship in 1996, he retired from the sport.
Adrian Käser first appeared in the sidecarcross world championship in 1988, on the side of Thomas Graf, participating in three GP's and earning a second place in the first race of the Czech GP as his best result. In the same season he also participated in two more GP's with different riders in each, Hubert Huwyler and Rudi Herren.[1]
The following season, he only raced in one even, on the side of Rene Raggenbass in the GP of Finland. In 1990, he did not take part in the world championship at all.
From 1991 onwards, his fortunes in the world championship took an up turn. He replaced Andreas Hüsser on the side of two-time world champion Christoph Hüsser and the team finished eighth in the world championship as well as taking out the Swiss national title. A sixth place followed the year after.
In 1993, Käser joined Andreas Fuhrer and the new combination became a dominant force in the world championship, winning four titles in a row from 1993 to 1996,[2] both racing for the Moto-Club Aarberg.[3] Additionally, they also took out the Swiss title in each of these four seasons. At the end of the 1996 season, both riders retired from the world championship.
| Season | Driver | Equipment | Position | Points | Races | Wins | Second | Third | |
| 1988 | Thomas Graf | KTM-VMC | 13 | 40 | 6 | — | 1 | — | |
| Huber Huwyler | KTM-EML | 9 | 18 | 2 | — | — | — | ||
| Rudi Herren | Honda-EML | 22 | 11 | 2 | — | — | — | ||
| 1989 | Rene Raggenbass | KTM-VMC | 52 | 1 | 2 | — | — | — | |
| 1991 | Christoph Hüsser | KTM-VMC | 8 | 124 | 18 | — | 2 | 1 | |
| 1992 | Christoph Hüsser | Yamaha-VMC | 6 | 175 | 25 | — | 1 | 2 | |
| 1993 | Andreas Fuhrer | Kawasaki-VMC | 1 | 391 | 36 | 7 | 2 | 5 | |
| 1994 | Andreas Fuhrer | Kawasaki-VMC | 1 | 232 | 20 | 3 | 5 | — | |
| 1995 | Andreas Fuhrer | Kawasaki-JHR | 1 | 261 | 16 | 8 | 2 | 2 | |
| 1996 | Andreas Fuhrer | Kawasaki-JHR | 1 | 262 | 20 | 4 | 3 | 3 | |
| Overall 1988 – 1996 | 1515 | 147 | 22 | 16 | 13 |