You ask we answer: GSX-R 750 throttle shuddering?

Posted: 01 Dec 2013

Allan wants to know why his GSXR throttle shudders

Allan Pitcher got in touch with us on Facebook to ask about the throttle shuddering on his GSX-R750 at 4,000rpm. We put his query to our panel of experts and here’s their answer:

ALLAN ASKS:

My GSX-R750 K4 keeps shuddering when throttle held around 4000 revs and then pops when I roll off. I’ve had the power commander remapped and the bike dyno'd twice. I don't think it's the fuelling. Could it be spark plugs or ignition coil?

OUR EXPERT ANSWERS:

Could be. Could also be a 100 other things that you might spend hours looking for. If you want to dedicate a night on the internet looking at forums in hope of finding the reason and cure, good luck to you. Your headache is made worse with the fitment of a Power Commander because the bike is no longer standard – as you’ve found out. First thing I’d do is make sure there are no air leaks on the rubber inlet stubs and also on any exhaust joints. Failing that, to save hassle, take the bike to a Suzuki dealer to see if its diagnostic kit can shed light on the cause. This might be cheaper in the long run.

Latest Advice
  • BikeSocial is offering three lucky home mechanics the chance to WIN a Haynes manual of their choice. Enter over on our Facebook page today.
    WIN a Haynes manual of your choice! | Rewards Giveaway
  • If your fork seals leak your motorcycle will handle poorly and be unsafe. Here’s how you can fix them yourself, with our DIY guide to motorcycle maintenance
    How to replace fork seals, oil and bushes
  • If your motorcycle’s brakes aren’t working right and you’ve bled the system and checked the calipers, the master cylinder might be bad. Here’s how to fix it
    How to rebuild a motorcycle brake master cylinder
  • What is BikeSafe? Ex-police sergeant Dave Yorke talks to the leader of this unique advanced motorcycle training to find out what you can expect…
    What is BikeSafe advanced motorcycle training?