JHS Racing are the no.1 approved Dynojet Power Commander tuning centre in Bristol and the south west, with our technicians fully trained and certified by Dynojet.

Using the most up to date Dynojet 250i dyno in our air-conditioned facility we can test bikes up to 500bhp. Combined with the very latest tuning link software we can supply and install Power Commanders for any bike, accurately setting up the fuelling and ignition to achieve optimum performance.

Dynojet's Load Control System uses the latest in eddy current power absorption technology which, combined with Dynojet software, enables our technicians to achieve consistent, repeatable results. The real-world benefits delivered by our dyno testing, tuning and set-up facilities are more than just an increase in top-end performance but improved smoothness, responsiveness and efficiency in all riding conditions.

JHS are the exclusive providers of dyno testing services and dyno performance data to Fast Bikes Magazine.

• DynoJet 250i Rolling Road
• Latest Tuning Link software
• Latest Suzuki diagnostic equipment to remove fault codes from ECU

We are also a Yoshimura Performance Centre and can supply all Yoshimura performance products direct from Japan.

We carry out all types of engine tuning for road or race applications, including bespoke engineering work. Please contact us for full specifications and pricing.

Judge from our results
We stand on our record. JHS have built and tuned racing bikes for many class-leading riders in the Supersport and MiniTwins race series. Trusted by top motorcycle racers, JHS have been able to deliver the winning advantage through our programme of consistent research, development and testing. For optimum performance on road or track you can rely on our equipment, knowledge and experience. We aim to exceed your expectations!

The fully-equipped dyno test room at JHS Racing. Computer controlled DynoJet 250i rolling road facilities.