GEAR YOSHIMURA ALPHA ZX-10R RACE SYSTEMS FROM £472
One of the side-effects of the new Euro4 emissions regulations could be a return to the glory days for performance exhausts such as this new three-quarter system from Yoshimura.
With the environmental grip tightening, high-powered bikes are being more strangled than before and fitting a race exhaust system is once again delivering the impressive power gains it used to in the 1980s and 90s.
This Alpha system is Yoshi’s latest design, with a more angular end-can that’s available in either a stainless steel or carbon-fibre finish. The link pipe is available in either titanium (5.5kg lighter than standard) or stainless steel (4.2kg lighter), with the price reflecting that.
But Yoshimura are open about the fact that ditching the bike’s catalytic converter is responsible for most of the claimed 5% increase in power over a standard ZX-10R.
The system is not road-legal because of the lack of pollution-control, but a £39 noisedeadening baffle is available to keep neighbours and MOT testers happy.
Yoshimura don’t quote power gains in actual bhp numbers because it depends on how much power the standard machine makes, and this varies from bike to bike. But it doesn’t take genius-level maths to work out that a 5% increase on a bike that makes a claimed 207bhp means a gain of around 10bhp.
There are three versions available – stainless steel link pipe and can (£472), stainless link pipe with carbon can (£579) or titanium link pipe with carbon can (£900).