VRD MOTORSPORT Seceondary injector kit - KTM group 250f/350f/450f 2023-2026

 

VRD Motorsport Secondary Injector Kit – KTM Group (SX-F 250 / 350 / 450)

 

 

Unlock the full performance potential of your KTM Group motocross machine with the VRD Motorsport Secondary Injector Kit, engineered for riders and tuners seeking sharper throttle response, stronger top-end power, and race-level fueling performance.

 

Precision-designed for KTM Group models – KTM SX-F 250/350/450, Husqvarna FC 250/350/450 and GasGas MC 250F/450F (if you want other brands included, just let me know), this kit features a built-in velocity stack that aligns perfectly inside the airboot, optimising intake airflow and ensuring clean, consistent fuel atomisation at high RPM.

 

 

 

 

Fitment & Airboot Compatibility

 

 

 

Easy Installation

 

 

The VRD Secondary Injector Kit requires only very small, simple airboot modifications.

Installation is beginner-friendly, requires no prior mechanical experience, and can be completed with basic hand tools.

 

 

2025–2026 Models

 

 

For 2025 and 2026 KTM Group models, the airboot design changed.

These bikes require a different, compatible airboot for the injector kit to fit correctly.

 

👉 VRD can supply this updated airboot for £45, which will be available as an option at checkout.

 

 

 

 

ECU Options to Suit Every Rider & Tuner

 

 

 

🔌 Option 1 – Plug-and-Play GET ECU with Custom VRD Mapping

 

 

For riders who want maximum performance instantly, the kit can be supplied with a GET ECU preloaded with VRD’s custom-developed mapping, giving:

 

• Correct secondary injector timing
• Perfect fueling throughout the RPM range
• Improved throttle response & over-rev
• Safe, reliable power for stock and modified engines

 

 

Simply plug in the ECU and ride—no tuning required.

 

 

🛠 Option 2 – Injector Kit Only (For Tuners)

 

 

For race teams, engine builders, and tuners who prefer full control, the kit can be purchased on its own:

 

• Compatible with GET ECUs
• Compatible with other aftermarket ECUs
• Perfect for custom dyno mapping and advanced tuning strategies

 

 

This option offers complete flexibility for those creating bespoke engine packages.

 

 

 

 

Performance Benefits of a Secondary Injector

 

 

 

📈 Increased Top-End Power & Over-Rev

 

 

Mounted further back in the intake tract, the secondary injector provides more time for the fuel to atomise, resulting in:

 

• Stronger high-RPM horsepower
• Sharper, longer over-rev
• Cleaner combustion at peak load

 

 

 

🎯 Smoother, More Linear Throttle Delivery

 

 

Improved mixture distribution produces a smoother, more predictable power curve—ideal for aggressive riding, deep sand, and race conditions.

 

 

🔥 Essential for Tuned & High-Output Engines

 

 

Perfect for bikes running:

 

• Ported cylinders
• Aftermarket exhausts
• High-compression setups
• Advanced mapping or race ECUs

 

 

The injector kit ensures your engine remains properly fueled while delivering maximum, safe performance.