There are two popular variations of the 4-cylinder engine: inline-4 and flat-4. Each comes with benefits and downfalls, which is something Jason Fenske of Engineering Explained tackles in his ...

“But the Yamaha has issues, because it is a four-cylinder inline and ‘too wide’. But now they can shrink the width of the engine by an inch, 6mm off each bore (6 x 4 = 24mm). “That means ...

Former KTM rider Jack Miller, who moved to Pramac Yamaha this season, on a one-year contract, has explained that Yamaha's current inline-4 engine is powerful enough to help the manufacturer climb ...