Features

• Removes factory restrictions and optimizes fueling for increased performance
  
• Provides up to 43% increase in power and torque compared to a factory stock bike
• Provides 8% increase in power and torque when paired with a full system aftermarket exhaust compared to a stock bike with the Stage 1 Flash
• 2-4% Increase in power and torque between 8,500 - 15,500 RPM when paired with a full system aftermarket exhaust compared to the same setup with the stock tune
• Tuned by individual cylinder to ensure that maps are optimized for each cylinder and provide consistent and optimal performance across all four cylinders
• Updated quick shifter map to enable quicker and smoother shifting
• Eliminates the stock throttle hesitation/bogging at very low RPM during initial acceleration
• Optimized fueling
• Advances ignition timing to improve power at the top end (full power only)
• Unrestricts Electronic Throttle Valve (ETV) at top end and increases opening above 7000 RPM (full power only)
• Increases rev limit by 300 RPM
• Disables top speed limiter
• Disables O2 sensor FI code
• Disables PAIR FI code
• Disables front wheel speed fault code
• Disables EVAP
• Disables fan relay FI code
• Your choice of standard or GP (reverse) shift pattern

Specifications

• Must be paired with an aftermarket exhaust
  • Use of a slip-on exhaust is possible, but will limit performance gains
• Developed using an MWR air filter - stock or any aftermarket air filter is still compatible 
  
• Should be used with 91/93 pump gasoline
• AIS should be blocked for optimal results
• O2 sensor should be removed for optimal results
  
• Only compatible with North American spec ECUs

Description

Kawasaki has placed fairly aggressive restrictions on their Ninja ZX-4RR and ZX-4R by limiting the power capabilities right out of the factory. We don't know the exact purpose, but it's reasonable to assume those restrictions were put in place to meet the strict emissions requirements for on-road use. We don't have any issue with that, but when you're dragging knee at the track and chasing faster lap times, that extra engine potential could be a total game-changer. That's why we immediately put our very own ZX-4RR on the dyno and began testing and tuning. After hours at the dyno and countless laps at the track, our WORX engineers have developed an ECU flash that unlocks massive performance gains. Our Stage 1 Tune is developed for riders with an aftermarket exhaust and either the stock or upgraded air filter, providing optimized fueling and ECU parameters for even better performance and shorter lap times. Break away from the pack and land your boots on the podium with the help of our TST WORX Tune.

AFTER TUNE: Please be aware that the Check Engine Light will be on and the Riding Mode and KTRC will flash after reinstalling the ECU. All of these will clear after one or two rides of at least 35-45 MPH.