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

If there’s one thing people associate with British bikes, it’s oil leaks. Rick looks at how to keep your shed floor clean by making sure the cylinder head joint is properly sealed

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

One howls and buzzes, and the other snorts and hammers. In both cases, you make them sing their song by way of a deliciously mechanical manual gearbox. These truly are two of the most exciting powertr

Steve Rothwell answering your ENGINE MANAGEMENT queries