Jenny Tinmouth has described becoming a member of the Honda Racing team for the 2015 British Superbike Championship as her "ultimate dream come true".
The 36-year-old from Ellesmere Port became the first female to compete in the series in 2011 and remains the only woman to have done so.
She said the offer was "totally unexpected" having previously competed as a privateer.
Tinmouth will compete in all 12 rounds of the series for the Louth-based team.
The fastest woman in Isle of Man TT history said: "I'm absolutely over the moon and cannot believe I'm riding for Honda Racing in the British Superbike Championship.
"The offer was totally unexpected.
"I went into the meeting thinking it would just be some help and came out as a full-time Honda rider.
"It's always been my ultimate dream to ride for the team."
Head of motorcycles at Honda Nick Campolucci said: "Jenny joins the team on merit and we are very pleased that we have the opportunity to work with her."
Team manager Havier Beltran added: "This is a fantastic opportunity for Jenny.
"This year will be a huge learning curve, getting used to the team and the bike, but will also really push her in the series and hopefully generate some good results.
"We've been aware of Jenny for a while now, not only being the only female in the BSB series but also her successes at the Isle of Man and can't wait to see her on the bike at the first test in March."
The Cheshire-based rider set the lap record during her first TT in 2009 and went onto break her own record the following year with an average lap speed of nearly 120 mph.
Tinmouth will compete aboard the Superbike-spec Honda CBR1000RR Fireblade alongside team-mates Jason O'Halloran and Dan Linfoot.