Ian Hutchinson will ride for Yamaha at TT 2011.
The rider who created history last year by winning all five solo races has signed for the next two seasons.
Hutchinson, who is currently recovering from a serious leg injury, has a total of eight victories on the mountain course.
Yamaha will also be celebrating its 50th anniversary and will be competing at the Isle of Man with full factory bikes for the first time since 1972.
Race team manager Shaun Muir is delighted with the whole package:
LIVE: 2026 Commonwealth Games
Live coverage from Glasgow from 23 July to 2 August
CWG: Busy day for Team Isle of Man in Glasgow
Manx records broke by Isle of Man's swimmers
Cycling event to bring road closures
Gran Fondo returns this weekend with new off-road format
DoI apologises for motorsport fees error
The chairman of Manx Auto Sport says the club accepts an error was made