Despite 140 years of development, some bike engines still consume the very stuff that’s there to protect them. Professor Jamie Turner explains why

Not the ones in the cylinder head, but the valves and variable flaps hiding in your exhaust system – made famous by the Yamaha’s EXUP. Here’s the what, why and how…

Just 30 years ago, diesel cars were a bit rubbish. They were loud, clattery, vibrating, smelly and usually appallingly slow. But politicians thought they were the bee’s knees, because they were margin

It’s unusual that a technical controversy should arise in Formula 1 before the concept has even been raced but that’s what happened during the off-season with the revelation that Mercedes had found a

Massively inclined engine, five valves per cylinder and almost vertical intakes. So is Yamaha’s FZ750 something truly special?

Steve Rothwell answering your ENGINE MANAGEMENT queries