I installed the Rapid Bike Smart2 Tuning Kit on my 2025 Husqvarna Vitpilen 401, and it has completely transformed the bike. The plug-and-play installation was simple, and the unit worked flawlessly with the stock electronics.

The throttle response is now much sharper, and the bike pulls harder through the midrange. The hesitation I used to feel at low RPMs has disappeared, and acceleration is smoother and more consistent across the rev range. It makes the 401 feel far more capable both in city riding and on longer weekend rides.

What impressed me most is that the refinement is just as noticeable as the added power. The engine feels smoother, runs cooler on longer rides, and fuel economy hasn’t changed at all. It’s not just about more power—it’s about a better overall riding experience.

If you own a Husqvarna Svartpilen or Vitpilen 401 from 2024–2025, this kit is an absolute must. It unlocks the bike’s full potential and makes every ride more fun and engaging.

I installed the Rapid Bike Smart2 Tuning Kit on my 2024 Husqvarna Svartpilen 401, and I couldn’t believe how much of a difference it made. Installation was quick and straightforward with the plug-and-play design, and the kit integrated perfectly with the bike’s stock electronics.

The throttle response is now much sharper, and the midrange torque feels stronger than ever. The hesitation I used to notice at low RPMs is gone, and the bike accelerates far more smoothly across the rev range. It really makes the 401 feel like a bigger, more powerful bike without sacrificing control.

What impressed me most is that the refinement is just as noticeable as the performance gains. The bike feels smoother, runs cooler on longer rides, and fuel economy hasn’t changed a bit. It’s not only faster—it’s better balanced and more predictable in every scenario.

If you own a Husqvarna Svartpilen or Vitpilen 401 from 2024–2025, this kit is a must-have. It unleashes the full potential of the engine and makes every ride more enjoyable.

I installed the Rapid Bike Smart2 Tuning Kit on my 2025 Husqvarna Vitpilen 401, and I was impressed right from the first ride. The plug-and-play installation was super simple, and it connected flawlessly with the bike’s electronics.

The performance gains are immediately noticeable. Throttle response is sharper, the midrange torque feels much stronger, and the slight hesitation I used to feel at low RPMs is gone. Acceleration is smoother across the rev range, which makes both city commuting and weekend rides a lot more fun.

What I like most is that the bike feels more refined overall. The engine runs cooler during long rides, fuel economy hasn’t changed, and the rideability is much smoother and more predictable. It doesn’t just add power—it makes the whole bike feel more balanced and complete.

If you own a Husqvarna Svartpilen or Vitpilen 401 from 2024–2025, this kit is a must-have upgrade. It makes the 401 punch well above its weight class.

I installed the Rapid Bike Smart2 Tuning Kit on my 2024 Husqvarna Svartpilen 401, and the difference is night and day. The plug-and-play installation was easy, and the unit synced perfectly with the bike’s electronics.

The throttle response is now incredibly sharp, and the midrange torque feels much stronger. The slight lag at lower RPMs has completely disappeared, making commuting smoother and highway riding far more confident. Acceleration is smooth and consistent across the rev range, which really wakes up the 401.

What impressed me most is how refined the bike feels overall. The engine runs cooler on longer rides, fuel efficiency hasn’t changed, and the rideability is much smoother. It’s not just an increase in power—it’s an upgrade in control and performance balance.

If you own a Husqvarna Svartpilen or Vitpilen 401 from 2024–2025, this tuning kit is a must-have. It brings out the full potential of these lightweight machines and makes every ride a lot more exciting.

I recently installed the Rapid Bike Smart2 Tuning Kit on my 2024 Husqvarna Svartpilen 401, and the improvement in performance is remarkable. The installation was straightforward—simply unscrewed the coil pod on the left side, cut the zip tie holding the lambda sensor, routed the harness through the seat, connected everything, and remounted.

The bike now feels more responsive, with smoother throttle transitions and a noticeable increase in mid-range torque. The self-adaptive logic of the stock ECU, combined with the enriched air/fuel ratio, has made the ride more engaging without compromising the stock configuration.

The Bluetooth connectivity allows for easy adjustments, and the plug-and-play design made the installation hassle-free. If you're looking to enhance your Svartpilen 401's performance, I highly recommend this tuning kit.