Jorge Lorenzo will hope to celebrate his new contract with Yamaha with his fourth victory of the year at Sunday's British MotoGP.
The 25-year-old Spaniard leads the MotoGP standings with 115 points and another win on Sunday would put him in a great position for a second world championship.
With Casey Stoner, who is second on the overall standings on 95 points, set to retire at the end of 2012, Lorenzo was tipped as a possible replacement for the Australian at Repsol Honda.
But Yamaha have moved quickly to extend Lorenzo's contract with the 25-year-old poised for a period of dominance in MotoGP.
"Jorge's contract extension allows both him and Yamaha to concentrate 100 percent on this year's championship challenge without any distractions," Lin Jarvis, Yamaha's managing director said on Tuesday.
"Also to make future plans together to further strengthen the winning partnership."
Lorenzo has won at Qatar, Le Mans and Barcelona this year and wants a fourth win to thank Yamaha for his new contract.
"I'm looking forward to paying back Yamaha's trust in me starting at Silverstone this weekend," Lorenzo said.
"I look forward to winning many more championships together.
"My dream to finish my career with Yamaha is now closer to becoming a reality."
The Yamaha rider won at Silverstone in 2010, the same year he won his only ever world title.
But it is Stoner and Valentino Rossi who have strong connections to the British MotoGP with both having won the race three times.
Stoner has won three of the last five times at Silverstone and knows a victory on Sunday will put him right back into title race.
The reigning champion trails Lorenzo by 20 points and leads his team-mate Dani Pedrosa by 10 on the overall standings.