1. Introduction
Thank you for choosing the LS2 FF370 Flip Up Motorcycle Helmet. This manual provides essential information for the safe and effective use, maintenance, and care of your helmet. Please read it thoroughly before using your helmet.
Key Features:
- Flip Up Helmet Style
- ABS Helmet Material
- Dual Lens System (Transparent main visor, Built-in sun visor)
- Removable and Washable Lining
- Comfortable and Breathable Interior
- 4-Channel Air Ventilation System
- Quick Release Buckle System
- Bluetooth Slot for communication systems
- SHARP and CCC Quality Certified


2. Setup and Fitting
2.1 Sizing and Head Circumference Measurement
To ensure optimal safety and comfort, it is crucial to select the correct helmet size. Measure your head circumference accurately before purchasing.
- Use a soft ruler to pass through the forehead (above the eyebrow bone) and the hump point at the back of the head.
- Measure the head circumference three times to reduce measurement error.
- Refer to the size chart below.

| Size | Head Circumference (CM) |
|---|---|
| L (59-60) | 56-58 CM |
| XL (61-62) | 59-60 CM |
| XXL (63-64) | 61-62 CM |
| XXXL (65-66) | 63-64 CM |
Note: There is a 1-2cm error in manual measurement. The actual measurement is based on the real object. Drivers wearing helmets for the first time must measure their head circumference before buying helmets.
2.2 Lens Removal and Installation
The main lens can be removed for cleaning or replacement.
- Turn the latch base counterclockwise.
- Remove the latch base.
- Separate the lens from the helmet.
- Remove the lens completely.

2.3 Helmet Fitting Removal
The internal helmet fittings can be removed for maintenance or to convert to a half-helmet mode.
- After removing the main lens, locate the base of the helmet fitting.
- Turn the screw with a screwdriver to loosen the fitting.
- Remove the widget.
- Remove the uncovering helmet parts to achieve the desired helmet configuration (e.g., retro Harley style or half helmet).

3. Operating Instructions
3.1 Flip-Up Mechanism
The LS2 FF370 features a convenient flip-up design, allowing you to easily raise the front section of the helmet. This is ideal for quick conversations, taking a break, or when riding at low speeds in appropriate conditions. To operate, locate the flip-up switch, typically near the chin bar, and press or slide it to release and lift the front section.

3.2 Dual Lens System (Main Visor & Sun Visor)
Your helmet is equipped with a transparent main visor and an internal, retractable sun visor for varying light conditions.
- Main Visor: Provides clear vision and protection. Ensure it is securely closed while riding.
- Sun Visor: To deploy the built-in sunglasses, use the quick sun visor control switch, usually located on the side of the helmet. Slide it down to engage the sun visor and up to retract it.

3.3 Ventilation System
The 4-channel air system is designed to accelerate air circulation, preventing stuffiness and ensuring comfort. It includes multiple air vents for optimal airflow.
- Air Inlets: Located at the top and lower bar of the helmet.
- Mouth Vent: Provides direct airflow to the face.
- Tail Exhaust Port / Air Outlets: Located at the rear to expel hot air.
The ventilation can be turned on or off manually to control airflow and ensure large oxygen intake.



3.4 Fastening Method
The helmet uses a plug buckle system for secure fastening. Ensure the buckle is properly engaged and adjusted for a snug fit before every ride.
3.5 Multi-Way Wearing Design
The LS2 FF370 offers versatile wearing options:
- Full Helmet Mode: Provides maximum protection with reduced wind noise.
- Uncovering Helmet Mode: The front section is raised, offering clear and open vision, and increased breathability.
- Half Helmet Mode: Achieved by removing specific helmet fittings (refer to Section 2.3), providing a lighter feel and increased airflow.

4. Maintenance
4.1 Lining Care
The helmet features a removable and washable lining. It is important to clean the lining regularly to remove dirt and sweat, ensuring comfort and hygiene. Follow these steps:
- Carefully remove the interior lining components.
- Hand wash with mild soap and lukewarm water.
- Rinse thoroughly and allow to air dry completely before re-installing.

4.2 Visor Cleaning
Clean the main visor and sun visor with a soft cloth and mild soap or a specialized helmet visor cleaner. Avoid abrasive materials or harsh chemicals that could scratch or damage the lens coating.

4.3 Exterior Cleaning
Wipe the helmet's exterior with a damp cloth and mild soap. Do not use petroleum-based products, solvents, or harsh cleaners, as these can damage the helmet's finish and materials.
5. Troubleshooting
- Visor Fogging: Ensure proper ventilation by opening the mouth vent and top vents. If fogging persists in cold or humid conditions, consider anti-fog treatments or a Pinlock-ready visor (if available as an accessory).
- Loose Fit: If the helmet feels loose, re-check your head circumference against the size chart. A helmet should fit snugly without causing pressure points.
- Difficulty with Flip-Up Mechanism: Ensure the mechanism is clean and free of debris. Apply a small amount of silicone lubricant if movement is stiff.
- Intercom Installation: The helmet includes a Bluetooth slot, allowing for the installation of most standard intercom systems. Ensure the speakers and microphone are positioned correctly for clear audio.
6. Specifications
| Feature | Detail |
|---|---|
| Brand | LS2 |
| Model | FF370 |
| Helmet Material (Housing) | ABS Engineering Plastics |
| Filler Material | EPS |
| Lens Material | PC Material (Polycarbonate) |
| Weight | 1550 ± 50g |
| Quality Certificate | SHARP (4-star), CCC Certification |
| Helmet Style | Flip Up Helmet |
| Lining Material | Composite Fiber Cloth |
| Number of Lenses | Double Lenses (Main Visor, Internal Sun Visor) |
| Fastening Method | Plug Buckle |
| Ventilation System | 4-Channel Air System (Top, Mouth, Tail Vents) |
| Applicable Seasons | Universal for all seasons |
| Applicable People | Adults (Unisex) |
| Approximate Dimensions | Length: 36.5cm, Width: 29cm, Height: 26.5cm |

7. User Tips
- Proper Sizing is Key: Always measure your head circumference carefully and consult the size chart. A well-fitting helmet is essential for both safety and comfort.
- Regular Cleaning: Keep your helmet clean, especially the visor and interior lining, to maintain clear vision and hygiene.
- Intercom Ready: Utilize the built-in Bluetooth slot to easily integrate your preferred motorcycle intercom system for communication and entertainment.
- Adapt to Conditions: Take advantage of the dual lens system and adjustable ventilation to adapt to changing weather and light conditions during your ride.
8. Warranty and Support
For any issues, questions, or warranty claims regarding your LS2 FF370 helmet, please contact the seller or manufacturer's customer support. Keep your purchase receipt as proof of purchase.