Quite a few shorter runs in the middle of the session; Bezzecchi continuing for now but his pace has dropped to the high-31s by now.
Marquez looks like he's just finished his second run, lapping still in the low-1:31s. Bezzecchi managing a similar pace, at a glance, still with the same soft rear he started with.
Improvement from Vinales in the early stages of his second run, goes P9 and 0.6s off the top.
Zarco heading out with the same rear aero Marini has been trying.
Decent improvement from Bastianini, actually, this afternoon, was only 15th this morning on a 1:32.159 but down to a 1:31.572 in PR.
A lot of riders back in the pits now, just under 15 minutes into the session.
M. Marquez, Bezzecchi, A. Marquez, Quartararo, Marini, Bagnaia, Bastianini, Morbidelli, Di Giannantonio, Acosta the current top-10.
Marc Marquez hits the top on the final lap of his first run, 0.140s ahead of Bezzecchi.
Absolutely everyone, by the way, on a medium front and only Martin with a used one.
Bezzecchi now back to the top ahead of Marc Marquez, Marquez with a medium rear.
Looks like Bezzecchi had that lap cancelled but Quartararo now fastest on a fresh soft rear.
Fresh medium-medium combination for almost everyone out there at the moment.
Acosta fastest on that combination briefly but Bezzecchi now to the top with a soft rear tyre new on for this session.
Noted the new Honda exhaust this morning, Marini also had some new rear aero that you can see below.
He's running it on both bikes this afternoon as reported by the MotoGP international TV feed broadcast.

Pit lane is open at Misano and Practice is underway for the next hour at the San Marino Grand Prix.
Only slightly warmer air temperatures than this morning at 28C, but track temperature up around 10C from the start of FP1 at 37C ahead of Practice.
FP1 this morning was topped by Franco Morbidelli, the Italian ahead of Fabio Quartararo and Fabio Di Giannantonio in the top-three.
Quartararo was unusually not the primary object of interest in the Yamaha camp this morning, nor will he be for most of this weekend, thanks to the presence of Augusto Fernandez, or, more specifically, Fernandez's V4-powered YZR-M1.
The Spanish test rider was 21st-fastest this morning, ahead of the two LCR Hondas who brought up the rear of the field, and around 1s behind Quartararo's best effort. He did have a mechanical on his first bike, reportedly an electrical issue, but was able to rejoin the session on his number two bike.
Championship leader Marc Marquez got off to a fine enough start in fifth place, one spot behind Catalunya winner Alex Marquez.
Francesco Bagnaia was in the top-10 for much of the session but he slipped to 11th at the end.
Pedro Acosta was the best of the KTMs in seventh, while Luca Marini ensured representation for all five manufacturers in the top-10 as he put his Honda sixth-fastest.
Welcome back to live coverage of today's action from the San Marino MotoGP where Practice is set to get underway in just under 20 minutes at 15:00 local time.
Speaking to the MotoGP world feed broadcast during FP1, Yamaha boss Maio Meregalli said that Yamaha was looking to take the V4 to Sepang next, and then Valencia, before the end of the season, after making its race debut this weekend in San Marino.
He also addressed the homologation restrictions preventing Yamaha from running the V4 for the remainder of the 2025 season.
Full story here.
Franco Morbidelli ends FP1 fastest, but he's crashed late on and is jogging away.
Quartararo second after a late lap from the Frenchman, while Di Giannantonio rounds out the top-three.
Alex Marquez and Marc Marquez complete the top-five ahead of Marini in sixth.
Acosta, Bezzecchi, Raul Fernandez, and Martin complete the top-10.
P11 for Bagnaia, which is at least a bit better than last week for the Italian.
Second crash of the session for Oliveira, looks like turn one. He's walking away.
Acosta improves, gets up to sixth with 16 laps on his tyre.
Improvement from Marc Marquez with 18 laps on his rear tyre, 1:31.611 to go 4th.
Bezzecchi improves his time but stays sixth with a 1:31.675.
Di Giannantonio improves as well to make it a VR46 1-2 with a 1:31.596.