Introduction
Welcome to the instruction manual for your new HJC i91 Solid Modular Motorcycle Helmet. This manual provides essential information regarding the helmet's features, proper usage, maintenance, and safety guidelines. Please read this manual thoroughly before using your helmet to ensure optimal performance and safety.

Image: The HJC i91 Solid Modular Motorcycle Helmet in Semi Flat Black, showcasing its sleek design and integrated shield.

Image: A rider wearing the HJC i91 helmet while operating a motorcycle on a scenic road, highlighting the helmet's intended use.
Safety Information
Your safety is paramount. Always wear a helmet that fits correctly and is securely fastened. Never modify your helmet, as this can compromise its protective capabilities.
DOT FMVSS 218 Compliance
The HJC i91 helmet is DOT-approved, meeting the stringent FMVSS 218 standards. This certification ensures the helmet has undergone rigorous testing for energy absorption, penetration resistance, and chin strap structural integrity, providing a high level of protection for on-road motorcycle use.

Image: A visual representation of a helmet undergoing a safety test, emphasizing its compliance with DOT standards for motorcycle helmets.
Proposition 65 Warning
This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, please visit www.P65Warnings.ca.gov.
Product Features
Advanced Polycarbonate Composite Shell
The HJC i91 features an advanced polycarbonate composite shell, engineered with CAD technology. This construction results in a lightweight helmet that offers a superior fit and enhanced comfort for the rider.

Image: A rider from a rear perspective, showcasing the aerodynamic design of the HJC helmet shell while riding a motorcycle.
HJ-33 Pinlock Ready Shield
The helmet is equipped with an HJ-33 shield that provides 99% UV-A & B protection and features an anti-scratch coating. It is Pinlock® ready, allowing for the installation of an anti-fog insert (sold separately) for clear vision in varying conditions. The helmet comes standard with a Black Dark Smoke sun shield installed.

Image: A detailed view of the helmet's clear main shield, highlighting its design and clarity.
HJ-V12 Integrated Sun Visor
An integrated HJ-V12 sun visor offers improved peripheral vision and adequate sunlight reduction. This dynamic multi-step sun visor is anti-scratch coated and designed for optimized positioning to minimize eye strain during rides.

Image: A rider wearing the HJC helmet with the internal sun visor lowered, demonstrating its function for glare reduction.
SuperCool Interior
The helmet features a moisture-wicking, quick-drying SuperCool Interior. The cheek and crown pads are removable and washable, ensuring easy maintenance and hygiene. Interchangeable cheek pads are available across all sizes for a customized fit. Glasses grooves are integrated to enhance comfort for riders who wear eyewear.

Image: Hands demonstrating the removal of the helmet's interior padding, illustrating the ease of maintenance for the SuperCool interior.
Advanced Channeling Ventilation System (ACS)
The Advanced Channeling Ventilation System (ACS) is designed to provide full front-to-back airflow. This system effectively flushes heat and humidity up and out of the helmet, keeping the rider cool and comfortable during long rides.
SMART HJC Bluetooth System Compatibility
The HJC i91 helmet is ready for SMART HJC 21B & 50B Bluetooth communication systems (sold separately). These systems are co-developed with SENA and are fully integrated into the helmet, allowing for optimal weight balance and aerodynamic performance without external bulk.

Image: A rider interacting with the integrated SMART HJC Bluetooth communication system, demonstrating its seamless fit within the helmet.
Initial Setup
Helmet Sizing and Fit
A properly fitting helmet is crucial for safety and comfort. Ensure the helmet fits snugly around your head without causing pressure points. The cheek pads should make firm contact with your cheeks. If the helmet moves freely when you shake your head, it is too large. Refer to HJC's sizing guide for detailed measurements.
Shield Installation/Removal
The HJ-33 shield is designed for easy installation and removal. To remove, open the shield fully and locate the release mechanisms on both sides. Press the release buttons/levers and gently pull the shield away from the helmet. To install, align the shield's pivot points with the helmet's base plates and press firmly until it clicks into place. Ensure both sides are securely fastened before riding.
Operating Your Helmet
Modular Function
The i91 is a modular helmet, allowing the chin bar to be raised. To open the chin bar, locate the release button, typically at the center front of the chin bar. Press the button and lift the chin bar upwards until it locks into the open position. To close, pull the chin bar down firmly until it latches securely. Always ensure the chin bar is fully locked in the down position before riding at speed.
Visor Operation
The main HJ-33 shield can be opened and closed by lifting or lowering it from the chin bar. The integrated HJ-V12 sun visor is operated by a slider mechanism, usually located on the side of the helmet. Slide it forward to deploy the sun visor and backward to retract it. Use the sun visor only in bright conditions and retract it when light conditions change.
Ventilation System Operation
The Advanced Channeling Ventilation System features adjustable vents. Locate the intake vents on the front (chin and forehead) and exhaust vents on the rear. Open or close these vents by sliding the respective levers to control airflow through the helmet, optimizing comfort based on riding conditions.
Care and Maintenance
Cleaning the Exterior
Clean the helmet's exterior with a soft cloth and mild soap and water. Avoid abrasive cleaners or solvents, as these can damage the shell's finish and protective coatings. Rinse thoroughly and air dry.
Cleaning the Interior
The removable cheek and crown pads can be hand-washed with mild soap and cold water. Allow them to air dry completely before reinserting them into the helmet. Do not machine wash or tumble dry.
Shield Care
Clean the HJ-33 shield and HJ-V12 sun visor with a soft, damp cloth and mild soap. Do not use harsh chemicals or abrasive materials, as they can scratch the anti-scratch coating. For best results, use a dedicated helmet visor cleaner. Allow to air dry.
Troubleshooting Common Issues
Visor Fogging
If your visor fogs up, ensure the ventilation vents are open to promote airflow. Consider installing a Pinlock anti-fog insert (sold separately) on your HJ-33 shield for enhanced fog resistance, especially in cold or humid conditions.
Discomfort or Pressure Points
If you experience discomfort or pressure points, re-evaluate the helmet's fit. Ensure you have the correct size. The SuperCool interior pads are designed to conform over time, but if discomfort persists, consider trying different interchangeable cheek pad sizes for a more customized fit.
Product Specifications
| Specification | Detail |
|---|---|
| Model Name | I91 |
| Shell Type | Hard (Advanced Polycarbonate Composite) |
| Safety Rating | DOT Certified (FMVSS 218) |
| Shield Type | HJ-33 Pinlock Ready Shield (99% UV-A & B protection, Anti-scratch) |
| Sun Visor | HJ-V12 Integrated Sun Visor (Anti-scratch) |
| Interior | SuperCool (Moisture-wicking, Quick-drying, Removable & Washable) |
| Ventilation | Advanced Channeling Ventilation System (ACS) |
| Bluetooth Compatibility | SMART HJC 21B & 50B (Sold Separately) |
| Closure Type | Ratchet |
| Item Weight | 3.46 pounds (approx.) |
| Product Dimensions | 15 x 11 x 11 inches (approx.) |
| Color (as reviewed) | Semi Flat Black |
| Manufacturer Part Number | 0848-0135-05 |
| UPC | 190501248794 |
What's in the Box
Upon unboxing your HJC i91 helmet, you should find the following:
- i91 Solid Natural Motorcycle Helmet (with pre-installed HJ-33 Pinlock Ready Shield and Black Dark Smoke Sun Shield)
Warranty and Support
Warranty Information
HJC Helmets typically offers a limited warranty against defects in materials and workmanship. Please refer to the official HJC Helmets website or contact their customer service for specific warranty terms and conditions applicable to your region and purchase date.
Customer Support
For any questions, technical assistance, or support regarding your HJC i91 helmet, please contact HJC Helmets customer service directly. You can usually find contact information on their official website or through your authorized dealer.




