Manx TT star Dave Molyneux and passenger Patrick Farrance set the quickest sidecar time of the week in Thursday's practice.
Molyneux, a 14-time TT winner, posted a lap time of 113.538mph to move to the top of the sidecar standings ahead of Tim Reeves and Dan Sayle.
The DMR Kawasaki racer said: "It's going well and the bike is going well."
Meanwhile, New Zealand's Bruce Anstey posted the fastest Superbike lap of the session with a 128.815mph lap.
Michael Rutter also posted a 128mph lap, with Guy Martin third quickest.
James Hillier topped the Supersport timings with a 125.664mph lap, whilst Ian Lougher topped the Supertwin timings with a 113.023mph average.
Karl Harris was quickest newcomer posting a lap of 119.017mph on his Superstock machine.
The opening Superbike TT race will get under way at 11:00 BST on Saturday, followed by the first sidecar race at 14:00 BST.