Michael Laverty has been signed up to ride for the Paul Bird Motorsport CRT ride in MotoGP in 2013.
The older brother or World Superbike rider Eugene Laverty, Michael will ride a custom-made British built PBM chassis with Aprilia engine, while his partner Yonny Hernandez will ride a full Aprilia ART package.
He steps up to MotoGP having ridden in PBM in British Supersport and British Superbikes. The offer of a ride presented itself when 2012 British Superbike champion Shane Byrne declined the offer.
Thirty-one-year-old Laverty said: "I'm a realist. Once you pass your mid-20s you think that if you haven't got to GP by then, it's not going to happen."
"I know I wasn't first choice for the ride, Shakey was.
"When he turned it down I was surprised to get the call, but it was a nice surprise.
"It's nice to be in a completely British project and it sounds very interesting on the PBM side of the garage.
"The chassis is developed by the GPMS guys who used to build all the chassis for the Kenny Roberts team and they've built a lot of Superbike swingarms and chassis parts over the last few years so they've got a lot of experience.
"They will be bolting an Aprilia engine into that chassis and then the Magneti Marelli control ECU which will be used by some teams next year and will then be obligatory in 2014."
Laverty is due to make his MotoGP debut at Sepang in the first week in February.