I recently installed the Rapid Bike Racing2 kit on my 2022 Kawasaki ZX‑10 R and couldn't be more impressed. The package arrived with a sleek, compact Racing2 ECU, a model-specific waterproof plug-and-play wiring harness, and easy-to-follow installation instructions. I had it mounted and functioning without any fuss.
From the first ride, the difference was unmistakable. The Racing2 integrates O₂ sensor signal reading and modulation, combined with digital multipoint fuel management, to constantly and intelligently adapt the injection map while riding. That means zero hesitation and smooth power delivery, even through varied conditions.
Pairing the kit with the companion smartphone app unlocked even more fun. You get three customizable riding modes—Eco, Touring, Sport—each with 20 intensity levels. Whether I'm conserving fuel for a long commute or unleashing full performance on a spirited ride, dialing it in is effortless.
But Racing2 doesn't stop there. It features:

Dynamic spark advance control, enhancing throttle responsiveness

Engine-brake management, smoothing deceleration and improving stability in corners

And if you're running the optional YouTune accessory, you unlock traction control, launch control, pit-lane limiter, dual preset map switching, and on-the-fly quick-shift tuning—all from your handlebars.

I just installed the Rapid Bike Racing2 kit on my 2022 Kawasaki ZX‑10R, and wow—the change is immediate and unmistakable. Installation was smooth and unintrusive, with a compact, lightweight ECU unit and a clean, plug‑and‑play harness, all clearly outlined in the instructions.
What truly impresses is the real-time adaptability. The Racing2 automatically manages both Narrow-Band and Wide-Band lambda (O₂) sensor signals to constantly update the fuel map as I ride. The result? Effortlessly smooth power delivery, especially in low- and mid-range RPM where I used to feel hesitation. It adjusts on the fly to weather, altitude, and throttle style—like my bike knows exactly what I need before I do.
Pairing with the smartphone app takes this upgrade to another level. I can toggle through three modes—Eco, Touring, or Sport—and tweak each across 20 intensity levels. Now I can soften the fuel curve for fuel-efficient commuting or crank everything up for track-ready aggression, all with a couple of taps
The kit also adds advanced features typically reserved for true track builds: support for electronic shifters, multiple map management, and the ability to shift up to +1000 rpm. Plus, I can remove the speed limiter with one click. And because my ZX‑10R has twin lambda sensors, the Racing2 allows independent mapping and correction for each cylinder—such precision!

Upgrading my 2022 Kawasaki ZX‑10R with the Rapid Bike Racing2 kit turned it into a masterpiece of adaptiveness and precision. Right out of the box, it was evident how much engineering went into this. The kit comes with a compact Racing2-specific ECU, a streamlined plug-and-play wiring harness, and straightforward mounting instructions—installation was clean and stress-free. The lighter chassis, faster microprocessor, and smaller overall footprint are noticeable improvements over the previous Racing model.
The true magic, though, happens once you pair it with the intuitive smartphone app. You’ve got three customizable ride modes—Eco, Touring, and Sport—each with 20 adjustable intensity levels. Whether I’m in fuel-saving mode for long rides, cruising city streets, or unleashing full-on track throttle, shifting the bike's behavior feels almost instantaneous and ridiculously smooth.
One of the most impressive features? The auto-adaptive fuel mapping, powered by advanced lambda sensor signal management (both Narrow-Band and Wide-Band). The ECU intelligently tunes fuel delivery in real time, adjusting to shifting weather, altitude, or riding style. The results are especially noticeable in the low to mid-RPM ranges—no sluggish throttle response, no hesitation, just razor-sharp delivery.
This kit also opens up a suite of performance upgrades:

Optional electronic shifter support,

Real-time dual map management,

RPM shifting up to +1000 rpm,

Removal of the speed limiter,

And on twin-cylinder bikes equipped with two lambda sensors, you can have a dedicated map and correction for each cylinder. That level of customization is rare.
For riders who crave even more precision, pairing with the YouTune controller unlocks real-time tuning on the move—manage engine-brake behavior for smoother deceleration and cornering, tweak shift cut timing, control the speed limiter with finesse, and monitor engine parameters live—all while riding. It feels like turning your motorcycle into a living machine that responds to your every input.