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MotoGP is set for a major technical change in 2027, with new rules likely to push all teams toward using V4 engines. This change could make it mandatory for Yamaha, the last remaining team using an inline-four engine, to switch to a V4 setup.
Why the Shift to V4 Engines?
Currently, Yamaha is the only team using an inline-four engine after Suzuki’s exit in 2023. While the inline-four offers smoother power delivery and better cornering, the V4 engine provides better top speed and acceleration, which other teams have taken advantage of. Yamaha has already started developing a V4 engine, but its official debut has been delayed.
The upcoming 2027 rule changes will reduce engine capacity from 1000cc to 850cc, but this is not the main reason teams will need to adopt a V4 engine. Instead, the biggest factor is the new aerodynamic regulations, which will limit the width of aerodynamic devices.
How Aerodynamics Influence the Engine Choice
MotoGP plans to cut down the width of aerodynamic wings to improve overtaking and reduce costs. To ensure teams comply, officials will use a standard-sized metal box—bikes must fit within this shape. A narrower engine, like a V4, gives teams more space within this limit to optimize their aerodynamics, making it the preferred choice.
Since the V4 engine is more compact than an inline-four, teams using it can maximize their aerodynamic advantages. This means that Yamaha, even if it prefers the inline-four, may be forced to switch just to stay competitive.
Yamaha’s Uncertain Future with V4
Though Yamaha has confirmed it is developing a V4 engine, it has not committed to using it in races yet. Some riders, like Jack Miller, believe the inline-four is still a strong option. However, with the new regulations favoring a narrower engine design, Yamaha might not have a choice but to adopt the V4.
If enforced, this rule change will mark the end of inline-four engines in MotoGP, making V4 engines the standard for all teams from 2027 onward.
