Yamaha has abandoned its long-used crossplane inline-four and switched the M1 to a V4 for the 2026 MotoGP season, a move framed internally as a shift from a contingency “plan B” to the primary strategy. Managing director Paolo Pavesio said the change was driven by the forthcoming 2027 technical regulations—notably a 50 mm reduction in front-fairing width and much tighter aerodynamic limits—that effectively leave an inline-four “no room for wings,” a position echoed by Monster Yamaha director Massimo Meregalli. While cylinder configuration is not explicitly banned, Yamaha concluded the V4 was the practical response to the new aero constraints and to prepare for the transition to an 850cc era that will follow the final year of 1000cc competition.

On track, Yamaha has already begun evaluating the V4: the new layout topped the Sepang shakedown day two timesheets with Jack Miller, and Fabio Quartararo finished as the fastest Yamaha at the end of the shakedown, about 0.5 seconds behind Honda test rider Aleix Espargaro. Toprak Razgatlioglu used the shakedown day to reacquaint himself with the circuit while Yamaha ran a structured test program across eight bikes to converge on an optimal package and supply equal equipment to all four riders. The factory plans to assess the V4 against the full 2026 grid during the Official Sepang test, and it has scheduled a first 850cc track run in private tests in early spring as parallel development of the smaller-displacement M1 continues.

Yamaha accelerated investment in personnel after slipping from title contention, hiring figures such as Max Bartolini and supporting a recovery that delivered a return to pole, a long-awaited podium and roughly doubled season points in 2025. Pavesio expects the V4 to bring more consistent race performance even if single-lap speed is initially lower, and he anticipates continued performance growth through 2026. By repositioning its technical strategy around a V4 architecture alongside ongoing 850 work, Yamaha has made a significant shift in engine development that could reshape competitive dynamics as teams adapt to the new regulations.

Sources