Editing Kenny Roberts, Jr.

In 1999, [[Suzuki]] signed him to their Grand Prix team. His debut race with Suzuki in Malaysia resulted in a surprise win, defeating the reigning champion, [[Michael Doohan]]. He went on to win the second race in Japan, where he again defeated Doohan. This winning streak put him as a strong contender to challenge Doohan for the championship. However Doohan retired due to injuries suffered during an accident on the third race in Spain. Afterward, the main challenge for the championship came from Doohan's teammate, [[Àlex Crivillé]]. Roberts failed to find consistency during the rest of the season, notching only two more wins and another four [[podium]]s. His lead in the championship subsequently was taken over by Crivillé, who later went on to win the title. Roberts would finish a respectable second in the championship.

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 [[podium]]s in 16 races. In the penultimate race of the season at [[Twin Ring Motegi|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 Motor Company|Yamaha]]. He was also being challenged by his younger teammate, [[John Hopkins (motorcycle racer)|John Hopkins]], who often outperformed 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 [[podium]]s, one in 2002 and one in 2005. At the end of [[2005 Grand Prix motorcycle racing season|2005]], Suzuki decided not to renew Roberts contract and opted for a younger rider in [[Chris Vermeulen]].

He returned to his father's team in [[2006 Grand Prix motorcycle racing season|2006]]. Honda provided the [[Honda RC211V|RC211V]] [[V5 engine]] with the frame being designed by [[Team Roberts]] and the bike subsequently named [[Team Roberts KR211V|KR211V]]. He took his first [[podium]] of the season at Catalunya, having started on the front row.  

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 checkered flag, and that this distracted him and prevented him successfully blocking [[Toni Elías]]' passing move. With these two [[podium]] finishes, 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.