Designed for the 2023 version of Yamaha’s thoroughly updated YZ450F, the Yoshimura RS-12 exhaust system claims impressive power gains for what is already a highly-tuned motocross machine – an 8% improvement in maximum power and a 13% increase in maximum torque. As well as the headline figures, Yoshimura claims increases in power throughout the rev range, including the all-important midrange. The stainless steel system features machined joints and a built-in resonator chamber. It has a matt-finish carbon fibre end cap and comes fitted with a low-volume baffle to keep the neighbours happier. SRP is £1176.
Performance Parts;
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Yoshimura RS-12
