1Storm Modular901
1Storm Modular Full Face Motorcycle Helmet User Manual
Model: Modular901
Brand: 1Storm
Introduction
This manual provides essential information for the safe and proper use, maintenance, and care of your 1Storm Modular Full Face Motorcycle Helmet. Please read this manual thoroughly before using your helmet and retain it for future reference.
Safety Information
Your 1Storm helmet is designed to provide protection during motorcycle riding. It meets Federal Motor Vehicle Safety Standard 218 (FMVSS 218) and is DOT Approved. Always wear a properly fitted helmet when riding a motorcycle.
- Ensure the helmet fits snugly and securely on your head.
- Always fasten the chin strap securely before riding.
- Never modify your helmet, as this can compromise its protective capabilities.
- Inspect your helmet regularly for any signs of damage. Replace the helmet if it has been involved in an impact, even if visible damage is not apparent.
Key Features
- Modular/Flip-Up Design: Allows the chin bar and visor to be raised, offering versatility.
- Dual Visor System: Features an outer clear shield and an inner smoked sun shield for varying light conditions.
- Rechargeable LED Tail Light: Enhances visibility from the rear, with multiple lighting modes.
- Durable Shell: Constructed from lightweight thermoplastic alloy.
- Comfortable Interior: Heavily cushioned, removable, and washable lining.
- Ventilation System: Aerodynamic design with multiple vents for airflow.
- Quick Release Buckle: For easy and secure fastening.

Figure 1: Helmet Feature Overview
This diagram highlights the key components and features of the helmet, including the mouth vent, scratch-resistant outer lens, rear LED tail light, one-click modular release mechanism, integrated sun shield, and quick-release chin strap buckle.
Setup and Initial Use
1. Fitting Your Helmet
A proper fit is crucial for safety. Refer to the size chart below to ensure you have the correct size. The helmet should fit snugly around your head without causing pressure points. Your cheeks should be compressed by the cheek pads.
US Motorcycle Helmet Size Chart
| Brand Size | Head Circumference (in) |
|---|---|
| XS | 20.9 - 21.3 |
| S | 21.7 - 22 |
| M | 22.4 - 22.8 |
| L | 23.2 - 23.4 |
| XL | 23.8 - 24.1 |
| 2XL | 24.4 - 24.8 |
Figure 2: Helmet Size Chart
If the helmet size does not fit correctly, contact customer support. Often, switching inner pads can resolve minor fit issues.
2. Charging the LED Tail Light
The helmet features a rechargeable LED tail light for increased visibility. Locate the USB charging port at the rear of the helmet. Connect the provided USB cable to the port and a suitable power source (e.g., computer USB port, USB wall adapter). The light will indicate charging status and full charge.

Figure 3: LED Tail Light and USB Charging Port
The image shows the rear LED tail light with its three modes (constant, flashing, strobe) and the convenient USB charging interface.
Video 1: 1Storm Modular Helmet LED Tail Light (Glossy Red)
This video demonstrates the functionality of the rechargeable LED tail light on the 1Storm Modular Helmet in glossy red, showcasing its various lighting modes for enhanced visibility.
Operation
1. Using the Modular Function
To raise the chin bar and outer clear shield, locate the release button (often near the chin bar). Press the button and lift the chin bar upwards until it locks into the open position. To close, press the release button again and push the chin bar down until it securely latches.

Figure 4: Helmet in Open (Modular) Position
This image illustrates the helmet with its modular front section lifted, providing an open-face configuration.
Video 2: Modular901 Motorcycle Modular Full Face Helmet w/ LED Light
This video demonstrates the modular flip-up mechanism and the dual visor system of the 1Storm Modular901 helmet, showing how to open and close the chin bar and operate the sun shield.
2. Dual Visor System
The helmet is equipped with two visors: an outer clear shield and an inner smoked sun shield. The outer clear shield can be raised or lowered manually. The inner smoked sun shield is operated by a slider mechanism, typically located on the side of the helmet, allowing you to deploy or retract it as needed for sun protection.

Figure 5: Helmet with Sun Shield Deployed
This image shows the helmet with both the clear outer visor and the tinted inner sun shield in the down position, ready for riding in bright conditions.
3. Ventilation System
Adjust the helmet's ventilation by opening or closing the mouth vent and top vents. These vents are designed to provide airflow and reduce heat buildup inside the helmet.
- Mouth Vent: Slide the switch on the chin bar to open or close the mouth vent.
- Top Vents: Slide the levers on the top of the helmet to open or close the top vents.
Maintenance
1. Cleaning the Helmet Shell
Clean the exterior of the helmet with a soft cloth, warm water, and mild soap. Avoid harsh chemicals, solvents, or abrasive cleaners, as these can damage the finish and shell material. Rinse thoroughly and air dry.
2. Cleaning the Visors
Remove the outer clear shield and inner sun shield before cleaning. Use a soft cloth and warm water with mild soap. Gently wipe the visors. Do not use abrasive materials or harsh chemicals. Ensure visors are completely dry before reattaching.
Video 3: 1Storm Modular Helmet Anti-Fog Pinlock Shield Installation
This video demonstrates the installation of an anti-fog Pinlock shield, which can be useful for maintaining clear vision in various weather conditions. While this specific helmet may not include a Pinlock, the video illustrates general visor handling and care.
3. Cleaning the Interior Lining
The helmet's interior lining is removable and washable. Gently detach the cheek pads and comfort liner. Hand wash them with mild soap and warm water, then air dry completely before reinstalling. Ensure all components are dry to prevent mildew.

Figure 6: Removable Interior Lining
This image displays the helmet's interior, highlighting the removable and washable cheek pads and comfort liner for hygiene and maintenance.
Troubleshooting
- Visor Fogging: Ensure vents are open for maximum airflow. Anti-fog treatments or Pinlock inserts (if compatible) can also help.
- Chin Bar Sticking: If the modular chin bar is difficult to operate, ensure the release mechanism is clean and free of debris. Do not force it.
- Loose Components: Periodically check all screws and fasteners. Tighten gently if loose, but do not overtighten.
- LED Tail Light Not Working: Ensure the battery is charged. If issues persist after charging, contact customer support.
Specifications
| Feature | Detail |
|---|---|
| Brand | 1Storm |
| Model Name | Modular901 |
| Color | Glossy Red (variant shown) |
| Material | Thermoplastic |
| Shell Type | Hard |
| Safety Rating | DOT Certified (FMVSS 218) |
| Number of Vents | 8 |
| Closure Type | Hook & Loop (Quick Release Buckle) |
| Item Weight | 4.79 pounds |
| Product Dimensions | 14.5 x 10.5 x 10.5 inches |
| Batteries | 1 Lithium Polymer (included) |
Warranty and Support
For warranty information or technical support, please refer to the manufacturer's official website or contact the retailer where the product was purchased. Keep your proof of purchase for any warranty claims.