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Front ABS intervenes prematurely under hard braking
brakes common
The ABS calibration is conservative and tends to intervene early, particularly at the front wheel under hard braking or over bumpy and uneven surfaces. Riders feel pulsing at the brake lever and a lengthened stop before the tire has reached its real grip limit. The system has a single fixed calibration that does not change with the selected riding mode, and there is no rider-selectable ABS-off function, so the early intervention is present at all times.
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False Neutrals and Clunky Transmission
drivetrain common
The transmission occasionally misses shifts, especially during quick upshifts above ~6,000 rpm. Most frequent between 2nd-3rd and 3rd-4th gears. Design-related play in the shift linkage. Downshifts described as clunky. Issue carried over from previous model—engine and transmission are carry-over parts.
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Base Model Suspension Struggles with Spirited Riding and Heavier Riders
suspension occasional
The standard suspension—KYB USD fork with no compression damping adjustment—dives excessively under hard braking. The rear shock sags during acceleration. It proves inadequate for heavier riders (200+ lb) and two-up riding. The setup is designed primarily for commuting and medium-speed riding. The 2022 SE with Öhlins S46 dampers and improved fork solves these issues.
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Inadequate Rear Brake Performance
brakes occasional
The rear brake provides minimal braking effect and is referred to by owners as 'utter crap'.
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Snatchy/Jerky Throttle Response at Low RPM
fuel system very common
The Z900 exhibits jerky, on/off-like throttle response at low RPM and speeds, particularly in 1st and 2nd gear. The motorcycle lurches when holding a constant low speed. Improved compared to the 2017-2019 generation, but not resolved. The first degree of throttle turn has a sharp snatch that disrupts smooth application, and snatchy low-speed throttle manners persist. Caused by emissions-related ECU tuning, not a mechanical defect.
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Unstable Bluetooth Connection, App Crashes, Pairing Issues
electrics occasional
The Kawasaki Rideology app (for the TFT display) exhibits recurring Bluetooth connectivity issues on both iOS and Android. Pairing drops after restarting the motorcycle, particularly with Android/Samsung devices. In rare cases, the cockpit's Bluetooth chip fails entirely, requiring instrument cluster replacement. App update 2.8.2 added a requirement for internet connectivity during the Bluetooth handshake.
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Turn Signal Mount Rubber Inserts Become Brittle and Break
bodywork common
The rubber inserts holding the stock turn signals in the body become brittle and break, causing the signals to hang loose on their wires. Vibration and UV radiation accelerate deterioration. OEM replacement turn signals also fail within 1–2 years. Affects multiple Kawasaki models of the same design, not just the Z900.
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Idle RPM Decreases Over Time, Causing Rough Running
engine occasional
Idle RPM gradually decreases over time, resulting in rough idle, stumbling, and occasional stalling. Some owners report idle RPM dropping below 1,000. Cold-start idle can climb to 2,500 rpm. Possible solutions include idle RPM adjustment, ECU software update, and fuel quality verification.
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OEM Front Brake Pads Wearing Out Faster Than Expected
brakes occasional
The stock sintered brake pads wear out during normal use after approximately 8,000–10,000 miles until reaching the wear limit. Inner pads wear faster than outer pads.
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Surface Corrosion on Stock Steel Screws and Fasteners
bodywork occasional
Stock steel screws and fasteners develop surface rust, especially in humid or coastal climates. Kawasaki uses standard steel fasteners instead of stainless steel or coated hardware.