1. Introdução
Thank you for choosing the HJC C91 Solid Modular 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 and keep it for future reference.

Figure 1: HJC C91 Solid Modular Motorcycle Helmet (White)
2. Informações de segurança
Your safety is paramount. This helmet is designed to provide protection during motorcycle riding. Always wear your helmet correctly and ensure it is properly fitted.
- Aprovado pelo DOT para máxima segurança: The HJC C91 helmet meets stringent DOT FMVSS 218 standards, meaning it’s been rigorously tested for top-level protection, from energy absorption to penetration resistance and secure chin strap testing.
- Certifique-se sempre de que a tira de fixação do queixo esteja bem presa antes de andar de moto.
- Never modify your helmet, as this can compromise its protective capabilities.
- Substitua o capacete após qualquer impacto, mesmo que não haja danos visíveis aparentes.
3. Principais características
- PINLOCK PIN PREPARED HJ-17 SHIELD: Offers 99% UV protection and features a RapidFire Shield Replacement System for fast, tool-free shield changes. An integrated black dark smoke sun visor enhances functionality.
- STURDY EXTERIOR: Built with an advanced polycarbonate composite shell and an easily adjustable chin bar using CAD technology, offering a lightweight and comfortable fit. It features an anti-scratch coated sun visor.
- COMFORTABLE INTERIOR: Features a moisture-wicking, quick-drying liner for long-ride comfort. The removable and washable cheek and crown pads ensure easy maintenance, while interchangeable cheek pads across all sizes offer a customized fit. Glasses grooves enhance comfort for eyewear users.
- AIR FLOW SYSTEM: The Advanced Channeling Ventilation System provides front-to-back airflow to expel heat and humidity, keeping you cool throughout the ride.
- SMART HJC READY: The HJC C91 Helmet features speaker pockets and is Smart HJC ready, making it compatible with the 10B or 20B Bluetooth systems (sold separately).

Figura 2: Lateral view of HJC C91 helmet, illustrating modular chin bar.
4. Componentes do capacete
Familiarize-se com os principais componentes do seu capacete HJC C91:
- Escudo exterior: Advanced Polycarbonate Composite.
- Main Visor (HJ-17 Shield): Clear, UV protective, Pinlock pin prepared.
- Viseira solar integrada (HJ-V5): Dark smoke, anti-scratch coated.
- Barra fixa: Modular, adjustable.
- Sistema de ventilação: Top vents, chin vent, rear exhaust vents.
- Forro interior: Moisture-wicking, removable, washable cheek and crown pads.
- Cinta de queixo: Secure fastening system.

Figura 3: Frente view of HJC C91 helmet, showing main visor and chin vent.
5. Instruções de operação
5.1 Main Visor Operation
- To open the main visor, gently lift it from the bottom edge. It can be set in multiple positions.
- To close, pull the visor down until it securely latches.
5.2 Operação do para-sol integrado
- To deploy the integrated sun visor, locate the slider mechanism on the left side of the helmet and slide it forward.
- To retract the sun visor, slide the mechanism backward.
5.3 Chin Bar (Modular) Operation
- To raise the chin bar, locate the release button on the underside of the chin bar (typically in the center). Press the button and lift the chin bar upwards until it locks into the open position.
- To lower the chin bar, press the release button again and gently pull the chin bar down until it securely latches into the closed position. Ensure it is fully locked before riding.
Sistema de Ventilação 5.4
- Ventilação no queixo: Slide the lever on the chin bar to open or close the chin vent for airflow to the face and visor.
- Aberturas de ventilação superiores: Slide the levers on the top of the helmet to open or close the top vents for head ventilation.
- Saídas de escape traseiras: These vents are typically passive and work in conjunction with the front vents to draw hot air out of the helmet.

Figura 4: Traseira view of HJC C91 helmet, highlighting the ventilation system.
5.5 Fecho da tira de queixo
- The HJC C91 uses a quick-release buckle system. Insert the male end into the female receiver until it clicks securely.
- Adjust the strap length for a snug, comfortable fit under your chin.
- Para soltar, puxe a aba vermelha na fivela.
6. Manutenção
6.1 Visor Replacement (HJ-17 Shield)
The RapidFire Shield Replacement System allows for quick, tool-free visor changes.
- Open the main visor fully.
- Locate the release levers on both sides of the visor mechanism.
- Pull the levers to release the visor from its pivot points.
- Carefully remove the visor.
- To install a new visor, align the pivot points of the new visor with the helmet's mechanism.
- Push firmly until you hear a click, indicating it is securely latched on both sides.
- Test the visor operation to ensure proper installation.
6.2 Interior Pad Removal and Installation
The cheek and crown pads are removable and washable for hygiene.
- Gently unclip the snap fasteners holding the cheek pads in place.
- Carefully pull the cheek pads away from the helmet shell.
- For the crown pad, locate the fasteners (snaps or tabs) and detach them.
- To reinstall, reverse the steps, ensuring all fasteners are securely reattached.
6.3 Cuidados e Limpeza
- Exterior Shell: Clean with mild soap and water. Avoid harsh chemicals or abrasive cleaners.
- Viseiras: Use a soft cloth and mild soap and water. Do not use abrasive materials or window cleaners.
- Almofadas internas: Hand wash with mild soap and water. Air dry completely before reinstalling.
- Guarde seu capacete em local fresco e seco, longe da luz solar direta e de temperaturas extremas.
7. Bluetooth System (Smart HJC Ready)
Your HJC C91 helmet is designed to be compatible with Smart HJC 10B or 20B Bluetooth communication systems (sold separately). Speaker pockets are integrated into the helmet for easy installation of these systems. Refer to the specific Smart HJC Bluetooth system's instruction manual for detailed installation and operation procedures.
8. Especificações
| Recurso | Especificação |
|---|---|
| Marca | HJC |
| Nome do modelo | C91 Solid |
| Número do modelo do item | 0847-0109-06 |
| Classificação de segurança | Certificado pelo DOT (FMVSS 218) |
| Material | Policarbonato (PC) |
| Forma | Oval |
| Peso do item | 3.46 libras |
| Dimensões do produto | 15 x 11 x 11.8 polegadas |
| Tipo de serviço do veículo | Bicicleta de rua |
9. Solução De Problemas
If you encounter any issues with your helmet, please review the relevant operating or maintenance sections. For persistent problems, consult a certified HJC dealer or contact HJC customer support.
10. Garantia e Suporte
HJC Helmets typically come with a manufacturer's warranty covering defects in materials and workmanship. Please refer to the warranty card included with your purchase or visit the official HJC webConsulte o site para obter os termos e condições específicos da garantia.
For customer support, spare parts, or additional information, please visit the Loja HJC na Amazon or the official HJC Helmets website.





