Tuned engines will be allowed again at the two sidecar races at T.T. 2014.
Organisers have decided to return to "Open Class" regulations after talking to many of the competitors.
For the last two years, crews were not allowed to run tuned engines in their outfits in an effort to bring costs down.
However, after consulting with the teams, operating budgets appear not to have signicantly reduced.
Crowe brothers encouraged by early preparations for TT 2024
Manx duo have three podiums from last four races on the mountain course
Jiu-jitsu: Academy aiming to take success to next level
Club inviting residents to give the sport a try this weekend
Football: Ramsey crowned combination one champions
Onchan beat Colby to win Masters FA Cup
Boxing: Burden hungry for glory on pro debut
'The Grenade' is becoming the first female pro fighter in Manx history
Davey Todd - Changes for TT 2024 'an exciting journey'
Saltburn man will have three different setups across solo classes this year
Payne & Rousseau win opening race of 2024 world championships
Steinhausen Racing duo make positive start to latest campaign
