The FuelX Pro+ is the ultimate performance fuel injection optimizer for the new-generation Royal Enfield Bullet 350 (2023–2024). Built on the refined J-Series engine platform, the modern Bullet 350 is smooth but restricted by lean factory tuning to meet BS6.2/OBD2 emission standards.
The Pro+ version provides the most comprehensive control over your engine, featuring 10 switchable maps that allow you to customize the bike’s character—from a fuel-efficient city commuter to a torquey, effortless highway cruiser.
Key Features
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10 Switchable Autotune Maps: Includes a handlebar-mounted, backlit map switch that allows you to cycle through 10 fueling levels. This allows you to prioritize fuel economy (Levels 1–3) or maximum torque and engine cooling (Levels 7–9).
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Handlebar Map Switch: Features a premium, weatherproof switch that lets you change the engine’s fueling personality on the fly without stopping the motorcycle or using external software.
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Real-Time Autotuning: Regardless of the mode selected, the Pro+ constantly monitors engine load, temperature, and altitude to maintain the perfect Air-Fuel Ratio (AFR) for that specific setting.
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Improved Low-End Torque: The Bullet is all about the “thump” and low-end pull. The Pro+ enriches the fuel mixture to provide a significantly meatier mid-range, allowing for easier overtakes and better pull even with a pillion or heavy luggage.
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Cooler Engine Operation: By correcting the lean factory mixture, the FuelX Pro+ helps the 349cc air-oil cooled engine run up to 10% cooler, which is essential for maintaining performance during long-distance touring or heavy traffic.
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Linear Throttle Response: Eliminates the “on-off” jerky sensation felt at low speeds, making the Bullet 350 even smoother and more refined during slow-speed urban maneuvers.
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Plug-and-Play Installation: Comes with a model-specific harness and OEM-spec connectors. No wire cutting or permanent modifications are required, making the setup 100% reversible.
Technical Specifications
| Feature | FuelX Pro+ Details |
| Compatible Model | Royal Enfield Bullet 350 (J-Series) |
| Year Range | 2023, 2024 |
| Operation Type | Manual Map Selection with Real-Time Autotune |
| Map Range | 10 Selectable Levels |
| Interface | Handlebar-Mounted Backlit Map Switch |
| Durability | Water, Heat, and Shock Resistant |
Why Upgrade to the Pro+ for Your Bullet 350?
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Tailored Riding Experience: You can keep the bike in “Eco” modes for your daily office commute and instantly switch to “Performance” modes for weekend rides or mountain climbs where you need that extra grunt.
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Exhaust & Filter Ready: If you have installed a free-flow exhaust (like Red Rooster or Hitchcock) or a high-performance air filter, the Pro+ is vital to ensure the engine doesn’t run dangerously lean, protecting your valves and spark plugs.
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Refined Thump: The optimized fueling provides a more consistent engine beat and a crisper exhaust note, enhancing the classic Bullet riding experience.
Installation Note
The FuelX Pro+ module is typically mounted under the side panels or the seat, while the waterproof map switch is installed near the left handlebar grip for easy thumb access. Because it uses original factory connectors, you can remove the unit before service visits to keep the bike’s original ECU history and warranty completely untouched.
