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…

Your non-diagnostic vehicle-related problems solved by Steve Rothwell

Steve Rothwell answering your ENGINE MANAGEMENT queries

Tracing and fixing faults in electronic engine management systems

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