S3 Powervalve tool

The S3 exhaust valve regulator will make you discover and enjoy your engine thanks to the control of your exhaust valve actuated easily and with your own hand. Its totally intuitive operation and suitable for any type of pilot, situation and terrain, will make you notice a VERY BIG change in engine reaction on the spot, being able to vary it in seconds even with the engine running without the need for tools and without damaging the system . Ease of operation and installation Instant motor feel change / reaction Minimalist design and remarkable results on the spot.