Alex Rins and Jack Miller provided the clearest comparison between Yamaha’s new V4 prototype performance and current inline M1 performance during Monday’s Misano MotoGP test.
Teammate Fabio Quartarraro spent the day in the V4, but Lyns completed 46 laps in the morning with the standard M1 and switched to the prototype at 34 laps in the afternoon.
The Spaniard recorded the best lap of 1M 31.571 on his inline race bike. 0.531S (See the table below).
Compare time gaps with the top – To improve afternoon grip conditions, Lyns was 0.857 seconds from Alex Marquez in the morning and 1.727 seconds from Pedroa Costa in the afternoon. 0.870 seconds.
“I’m very pleased with how the bike works,” Rins, who won the 2023 COTA Grand Prix with the Honda V4, told Motogp.com.
“That’s true. It’s a really new project that Yamaha invests a lot of time, and it was really, really great that Yamaha riders have two bikes to test here. I’m very grateful for that.
“It wasn’t easy so I tried to adapt to the bike. I only rode it in the afternoon. Overall it was pretty positive. I feel like the braking has been a little better than the inline 4.
“We’ve been struggling with a lot of things and it’s become natural with the V4. Certainly there’s a lot of room to improve. It’s the second time I’ve been on track with this bike. Like I said, it’s really a new project.
“It certainly is different the next time I ride my bike, that will be different, different parts of the bike.
“I’m very happy. And yet, like I said, there’s a lot of room for improving power in many aspects, in many aspects. But they’re working so hard and we’re in a good way.”
Jack Miller, 2025 Misano Test
Jack Miller Lap Time Comparison
Lin was switched from inline to V4 on Monday, but Pramac’s Jack Miller went in the opposite direction.
The Australians handed over to the Monster Yamaha Rider in Session 2 after starting V4.
Miller set the V4 to 1M 32.635 (+1.921S) in the morning, improving it to 1M 31.660S (+1.286S) inline. That’s the difference in lap times 0.975S Differences in “Gap Time” 0.635Ssimilar to the Rins numbers.
“The engine character is nice. I have that inertia and now I can work with that inertia,” Miller said.
“Electronics require a lot of work. Obviously, after 20 years of working inline, neither the mapping or throttle control nor the electronic side is really compatible.
“So it’s a whole new process of construction and improvement every time you leave the garage. That’s what it was today. Every time you leave the garage, it’s gotten even better.
“It takes at least a week to do that, so we’re a good way. There’s a traction area. The good thing about this V4 has basically changed everything about the motorcycle, but it seems that Yamaha DNA, which has a hard chassis under you, is still there.
“This is not a bike in Valencia from a chassis perspective, or something like that, so as the first version, we are in the ballpark.
“For me, it’s 1.9 out of the morning pace and Fabio is even closer. That’s not bad. It’s a good foundation.”
V4 lap time comparison:
| rider | Best V4 Hours | Best inline time | difference |
|---|---|---|---|
| Alex Lynz | 1M 32.101S | 1M 31.571S | +0.531S |
| Jack Miller | 1M 32.635S | 1M 31.660S | +0.975S |
V4 ‘Gap Time’ comparison (with the fastest rider):
| rider | V4 Gap | Inline gap | The difference between V4 |
|---|---|---|---|
| Alex Lynz | +1.727S | +0.857S | +0.870S |
| Jack Miller | +1.921S | +1.286S | +0.635S |
Meanwhile, Quartarraro said he was too bright about the new bike and couldn’t feel the real benefits of the Misano V4.
The French set the fastest V4 hours at 1m 31.598 in the afternoon, finishing 18th on the total timesheet (+1.224S from Acosta).
Monday was the second time Quartararo, Miller and Rins tried out the V4 after their debut in a post-private race test at Barcelona.
Test rider Augusto Fernandez, who finished 14th in V4 at the San Marino Grand Prix on Sunday, will return for more wildcard appearances at Sepang and Valencia.