The fastest female racer in the country will again team up with TWR, who are returning to the series for a second season.
"I am really happy to be back on the grid next season and we start 2013 in a much better position than we did this year," Tinmouth said.
"We ran the bike pretty much to Superstock standard this year so that I could learn the bike and get the basics how I wanted it to be and now we are using the winter to tune the engine so it has more power; so there is big potential there.
"I am aiming really high for next year and I want to be moving up the order and getting nearer to the front. I am one million percent determined to improve and we are putting in a lot of effort over the winter to try and achieve that goal next year; I can't wait to get started."
- Sports & Recreation