Suzuki GSX-S1000 Problems

Suzuki GSX-S1000 Problems

GSX-S1000F and GSX-S1000 together
GSX-S1000F and GSX-S1000 together

No motorcycle is perfect and the Suzuki GSX-S1000 problems are few. but it does have some.   This is a list of the main problems and how to fix them.

  • Throttle Snatch
  • Constant Throttle
  • Brakes
  • Rear Shock
  • Clutch Cable wear
  • Wheel Bearings

Suzuki GSX-S1000 Throttle Snatch (see link for more details)

Suzuki GSX-S1000 problems

This is by far the most common complaint about the Suzuki GSX-S1000, mentioned by many reviews and owners.  It is a very off-on throttle caused by bad fueling and systems to allow the bike to comply with Euro 4 regulations.  Every bike seems to be differently affected by it, and there are a number of ways to fix it or at least reduce it, it seems to be mostly caused by running very lean and fuel cut on over-run

  • New Improved ECU

Later versions of the 2015/16 GSX-S1000 had an updated ECU, this seems to fix the surging at low throttle and also seems to help a little with the snatch.  ECU part numbers for the GSXS are 32920-04K*0 or 32920-04K*1 with the * relating to region and the 0 earlier bikes and the 1 the later ECU.   ECU Part Numbers for Suzuki GSX family.

  • Booster Plug

The booster plug is a sort of a bodge that causes the bike to think the air inlet temperature is 20 degrees colder and thus add 6% additional fuel, reports vary with some riders saying it works and many saying its a waste of money.

Throttle position sensor, on many bikes these seem to be set incorrectly from the factory and setting them up correctly can make the  bike much smoother, see link for 2 methods of setting TPS correctly

  • PCV

Power Commander Five, this is a piggy back fuel injection unit that sits between the ECU and the fuel injectors and can modify the time the furl injectors are open for thus enriching or leaning out the mixture, not many good pre-existing maps seem to exist for this

This is probably the best way to fix this issue as a reflash can change many aspects of the ECU’s behaviour, changing ignition advance, fueling, turning fuel cut off and turning the O2 sensor off

  • Throttle Tamer

This is a replacement throttle tube with a slower opening cam at low throttle, this makes the throttle less sensitive to movement, after a reflash I went the other way and fitted a faster throttle

Suzuki GSX-S1000 Constant Throttle

A surging effect when driving at constant slow speed, Can be cured by similar ways to the snatchy throttle but also removing the O2 sensor which causes the bike to run very lean, this needs a reflash or an O2 sensor eliminator

Suzuki GSX-S1000 Brakes

The Suzuki GSX-1000 brakes are very well specified with radial Brembo Callipers on 310mm discs at the front.  However the pads do not have a very high coefficient of friction which means that they do not bite into the disc very well so lots of power is needed at the brake lever to stop quickly. Suzuki designed them this way to give long life for the pads and safety by not making the brakes grabby.

Most experienced riders like more feel, more bite and to be able to brake hard with 2 fingers.  A very straightforward upgrade is to change the pads to EBC Sintered or Vesrah JL/RJL pads.  This improves the bite of the brakes significantly.

Further upgrades can be made by changing to Braided Stainless steel brake lines and further still with a Brembo radial master cylinder.

Suzuki GSX-S1000 Rear Shock

Another of the Suzuki GSX-S1000 problems is the rear shock, although the front suspension on the GSX-S1000 is superb, KYB big piston upside down fully adjustable forks, Suzuki saved money on the rear shock, with a poorly designed basic shock with only preload and rebound adjustment. The rear suspension can give an uncomfortable and uncontrolled on bumpy roads.  It cannot be rebuilt easily so best to replace it. Alternatives are listed below.


Clutch Cable Wear

The clutch cable passes between the radiator and the frame on the right side of the bike (looking forward), a quick and easy fix for this is to attach clear plastic hose over the clutch cable to fix another of the Suzuki GSX-S1000 problems.

GSXS Wheel Bearings

The wheel Bearings on some Suzuki GSXS seem to be very bad quality and rust and degrade very quickly


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