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Digital Subscriptions > Fast Bikes > Issue 325 April 2017 > BIGGER IS NOT ALWAYS BETTER


With so many exhaust styles and sizes on the market, it’s a headache working out what’s best for your bike. We asked James what works…
Welcome to boom town!


Bigger really isn’t always better. That’s what I tell my wife anyway. Exhaust bores and diameters are vital to power and smooth running, which is why good exhausts cost a pretty penny. It’s all about exhaust gas speed and flow, speed and flow, otherwise known as fluid dynamics. If you get an old traffic cone (or a new one) and blow through the top, you get a big trombone noise from the bottom. If you do it the other way, what do you get? A soft, wet fart. Exhaust gases work very similarly.

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Fast Bikes is home to the best sportsbike tests on the planet and is packed with new bike launches, technical insight, hardcore action, masterclasses, racing, reviews and loads more.