With a week to go until entries close, over ten teams have confirmed they will be competing in T.T.X.G.P..
The number of riders signed-up has not been released - the closing date for them to register is the 31st March.
Billed as the world's first clean emissions motorsport event, it will take place over one lap of the Mountain Course at 11 o'clock on Senior Race Day.
A special "Motorsport in Symphony" concert will be held at the Villa Marina the evening before, performed by the London Metropolitan Orchestra.
Tourism Minister Martyn Quayle says fans will get the chance to see one of the bikes on the island next weekend:-