V4 Engine Prototype.

• The team acknowledges needing improved straight-line speed and rear grip, and is pursuing two engine development projects concurrently:  one focusing on the current inline engine and another on the V4.  Test rider Augusto Fernandez confirmed only the inline engine is being tested at Aragon.

• Fabio Quartararo noted Yamaha's past struggles with speed and current issues with electronics and rear tire temperature, while hinting at a new engine test on Monday, but remaining secretive about its specifics.