Kenneth Lee (Kenny) Roberts Junior (born July 25, 1973 in Mountain View, California) is an American motorcycle road racer who won the 500cc Road Racing World Championship in 2000. He joins his father Kenny Roberts, as the only father - son duo to have won 500cc World Championships.
He renewed his championship challenge in 2000. With Crivillé failing to regain his form, Roberts' main challenge came from Valentino Rossi, a rookie rider fresh from winning 250cc title. This time, Roberts managed to find consistency by taking four wins and five podiums in 16 races. In the penultimate race of the season at Motegi, Roberts finally clinched his first title. He became the first son of a former champion to also win the title. His victory also meant Suzuki successfully broke Honda's six year championship win streak.
In 2001, Roberts and Suzuki faced a tough task to defend the title. With Rossi dominating the series to win the title, Roberts only managed a single podium and finished the season in disappointing 11th position. This also marked the end of the two-stroke 500cc bike era as the regulations changed for 2002
Between 2002 and 2005, Roberts faced a difficult time in developing the new four-stroke 990cc Suzuki GSV-R bike to challenge Honda and Yamaha. He was also being challenged by his younger teammate, John Hopkins, who often outperfomed him. Even in 2003 and 2004, Hopkins managed to finish the season ahead of Roberts. During the 4 year period, Roberts only managed to gain two podiums, one in 2002 and one in 2005. At the end of 2005, Suzuki decided not to renew Roberts contract and opted for a younger rider in Chris Vermeulen.
A run of five successive top five grid positions in mid-season showed the bike's promise. He again finished 3rd at Estoril, having lead with one lap to go. Kenny later explained that he had miscounted the number of laps, and when he came onto the final straight with one lap to go, he expected to see the chequered flag, and that this distracted him and prevented him successfully blocking Toni Elías' passing move. With these two podiums, he finished 6th in the standings at the end of the year, aided by riders such as Casey Stoner and Sete Gibernau missing races. This was Roberts best result since winning the championship in 2000.
Roberts remained on his father's team at the start of 2007. However, 2007 again marked a new era as 990cc bike were replaced with an 800cc displacement formula. He rode the KR212V bike which are using the RC212V's V4 engine supplied by Honda. The 2007 season was less successful, due to Honda concentrating on improving the underperforming Repsol Honda factory machine. After only 4 points in the first part of the season, Kenny Jr. stopped racing midseason, replaced by his brother Kurtis, and never returned in 2007. The entire team has not raced in 2008.
| Seas | Class | Moto | Race | Win | Pod | Pole | FLap | Pts | Plcd | WCh |
|---|---|---|---|---|---|---|---|---|---|---|
| 1993 | 250cc | Yamaha TZR250 | 1 | 0 | 0 | 0 | 0 | 6 | 27th | 0 |
| 1994 | 250cc | Yamaha TZR250 | 4 | 0 | 0 | 0 | 0 | 23 | 18th | 0 |
| 1995 | 250cc | Yamaha TZR250 | 13 | 0 | 0 | 0 | 0 | 82 | 8th | 0 |
| 1996 | 500cc | Yamaha YZR500 | 13 | 0 | 0 | 0 | 0 | 69 | 13th | 0 |
| 1997 | 500cc | Modenas KR3 | 15 | 0 | 0 | 0 | 0 | 37 | 16th | 0 |
| 1998 | 500cc | Modenas KR3 | 13 | 0 | 0 | 0 | 0 | 59 | 13th | 0 |
| 1999 | 500cc | Suzuki RGV500 | 16 | 4 | 8 | 5 | 5 | 220 | 2nd | 0 |
| 2000 | 500cc | Suzuki RGV500 | 16 | 4 | 9 | 4 | 3 | 258 | 1st | 1 |
| 2001 | 500cc | Suzuki RGV500 | 16 | 0 | 1 | 0 | 0 | 97 | 11th | 0 |
| 2002 | MotoGP | Suzuki GSV-R | 15 | 0 | 1 | 0 | 0 | 99 | 9th | 0 |
| 2003 | MotoGP | Suzuki GSV-R | 13 | 0 | 0 | 0 | 0 | 22 | 19th | 0 |
| 2004 | MotoGP | Suzuki GSV-R | 12 | 0 | 0 | 1 | 0 | 37 | 18th | 0 |
| 2005 | MotoGP | Suzuki GSV-R | 14 | 0 | 1 | 0 | 0 | 63 | 13th | 0 |
| 2006 | MotoGP | KR211V | 17 | 0 | 2 | 0 | 1 | 134 | 6th | 0 |
| 2007 | MotoGP | KR212V | 7 | 0 | 0 | 0 | 0 | 4 | 24th | 0 |
| Total | 185 | 8 | 22 | 10 | 9 | 1210 | 1 |