Jorge Martín lost a position after touching the green at Turn 10. Tyre wear then limited his Aprilia and clouded Sunday’s race plan.
During the final three laps at Motegi, Jorge Martín could barely open the throttle with his Aprilia upright. The rear tyre had overheated on the left side before the problem spread toward the centre. That was the warning.
The rider told DAZN that he reduced the available power and calculated that a 1.1-second margin on the last lap would be enough. It was not. Other riders caught him, and he now says a repeat on Sunday could force him to retire.
Martín was also angry with himself after touching the green at Turn 10. He had tried to get the motorcycle cleanly out of the corner and used more lean angle than planned. The mistake cost him a position he believed he could keep.
MotoGP arrived at Motegi with a new track surface and a revised Michelin rear-tyre specification, leaving teams with limited reliable data for predicting long-run degradation.
The error mattered. It was not the main threat to his weekend.
Tyre wear cut the Aprilia's performance through the Sprint. Martín said he could no longer accelerate normally, even when the bike was upright. Without that loss of grip, he believes he would have stayed close to Marc Márquez until the finish.
Passing Márquez would still have been difficult, Martín admitted. The gap should have been much smaller.
Motegi offered teams a difficult starting point. The circuit had a new surface, and Michelin brought a revised rear-tyre specification. Friday running had already shown that Martín's balance changed between the medium and soft compounds. He felt good on the medium in the morning, then found a different balance in the evening. The soft tyre cost him speed.
The Sprint confirmed those concerns. Crash.net and Motorsport.com described the tyre trouble as a wider Motegi problem rather than an issue limited to Martín's Aprilia. Francesco Bagnaia reported similar difficulties, while Marc Márquez experienced a smaller change in rear-tyre behaviour.
Francesco Bagnaia had already warned that comparisons with the previous Japanese Grand Prix would be of limited value because both the asphalt and the tyre package had changed. He said teams first needed to understand the available grip and tyre behaviour, while expecting the fight to be around the top seven.
Bagnaia had warned before the Sprint that last year's Japanese race offered little useful guidance. The asphalt and tyre package had changed. He expected the fight to centre on the top seven while teams learned how much grip the new surface could provide.
The soft tyre is not a realistic Sunday choice for Martín. The medium compound still needs to be assessed. If it produces the same drop in grip, the Aprilia rider says he may have no option but to retire.
The risk is real.
Martín's comments point to a problem shared by several front-running riders, even if the severity differed. Marc Márquez suffered less than Martín. Bagnaia also felt the rear tyre deteriorate.
That distinction matters. The lost position came from one mistake at Turn 10. The larger concern appeared in the final three laps, when Martín could no longer apply power. The error cost him immediately. The tyre issue could shape the entire Sunday race.
Marc Márquez's Sprint victory added to the sporting pressure. Motorsport Week reported that Márquez extended his advantage in the championship battle after Martín received a late penalty and the classification changed.
Martín still showed enough pace to stay near Márquez when the tyre held. Pace alone will not protect him if the medium fails in the same way. Aprilia must find a setup that lets him accelerate normally until the finish.
