Can a Power Commander V transform the GSX-S1000’S dodgy fuelling?
Fixing the fuelling
Remember those awful Churchill adverts with the nodding dog? That’s what you feel like trying to ride the GSX-S1000 through town, or anywhere where you have to treat the throttle with anything less than full aggression. The unwelcome nodding sensation comes from the Suzuki’s schizophrenic fuel map; so smooth when hard on the gas, so abrupt when you shut the throttle – and with one of the worst transitions from closed to open since Honda’s SP1. It definitely needed sorting.
I’ve felt little need to trouble the excellent team at Dynojet over the last few years, thanks to most modern bikes fuelling with great precision – while they used to be the first call I made every year. The hunt for extra horses, improved midrange, and a clinical throttle response always made the Power Commander a must-have accessory – and I had no real doubt that the GSX-S would benefit from one.
With the latest PCV in my hand (£368.48, dynojet.co.uk), I set aside a morning to carefully strip the GSX-S, and secrete the magic box of tricks. The PCV plugs into each of the four injectors, as well as the Throttle Position Sensor, to reinterpret the signals from the throttle and measure out exactly the right amount of squirt from the injectors. It took an hour and a half to fit, working methodically, and cleaning each part as I stripped the side panels, and tank, radiator and ignition shrouds so that I could prop up the tank and get to the injectors. Once exposed, it’s a twominute job to pop the injector and TPS connectors off, and reconnect them with the PCV as a bridge. Add the earth connector to the negative battery terminal, and you’re done. Refitting is the opposite of removal.
Dynojet sent the unit with a base map installed, so it really is plugand-play – although you’ll always get the very best results from a bit of bespoke dyno set-up time.
Has it worked? Damn right it has. Gone is the lurching, snatchy, defiantly obstinate throttle response, to be replaced with what I can best describe as ‘normal’ fuelling. That’s not an insult. Clean, precise delivery, right from the previous ‘danger zone’ of 2-3500rpm, is combined with a dramatically smoother transition from closed to open throttle, and a far less face-planting reaction when you shut-off. The sensation of the throttle ‘hunting’ on an even throttle is also gone. It’s a revelation – and my neck muscles feel better already.
‘Has it worked? Damn right it has. Gone is the lurching, snatchy, obstinate throttle response’
£368 well spent. The Suzuki has beenbeen cleaned up by the Power Commander Strip down tank up and it’s time for some fuelling magic