HJC - C91 Nepos Modular Helmet - Black | Fluorescent Yellow | MC3HSF | Matte
The C91 Nepos carries HJC's full modular feature set with a distinct graphic treatment for riders who want their helmet to stand out as much as it performs. The Advanced Polycarbonate Composite Shell is CAD-engineered for a lightweight, superior fit, and the adjustable chinbar locks securely into place for full-face coverage. Air moves front-to-back through the Advanced Channeling Ventilation System to flush out heat and humidity, and the Pinlock-prepared HJ-17 shield provides 99% UV protection while swapping tool-less via the RapidFire shield replacement system. A smoke-tinted, anti-scratch sun visor deploys quickly on a user-friendly sliding mechanism. Inside, moisture-wicking interior parts stay dry, and the removable, washable crown and cheek pads interchange across shell sizes, with glasses grooves built in for eyewear-wearing riders. A double D-ring chin strap keeps everything locked down, and built-in speaker pockets combined with SMART HJC Bluetooth readiness make it simple to add a comm system later. Whether you're commuting through traffic or riding out with the crew, the C91 Nepos keeps you protected, comfortable, and easy to spot.
Features
- Advanced Polycarbonate Composite Shell — With adjustable chinbar; lightweight, superior fit and comfort using advanced CAD technology
- Advanced Channeling Ventilation System (ACS) — Full front to back airflow flushes heat and humidity up and out
- Pinlock® Prepared HJ-17 Shield — Provides 99% UV protection
- RapidFire™ Shield Replacement System — Simple and Secure shield ratchet system provides ultra-quick, tool-less shield replacement
- Interior Parts — Moisture-wicking and dry
- Integrated Sun Visor — Black dark smoke sun visor deploys quickly and easily; anti-scratch coated and with user friendly sliding system
- Crown and Cheek Pads — Removable and washable
- Glasses Grooves — Accommodates riders who wear eyeglasses and sunglasses
- Cheek Pads — Interchangeable throughout all shell sizes
- Double D-ring chin strap
- Ready for SMART HJC Bluetooth (Bluetooth sold separately).
- Speaker Pockets — For Bluetooth communication
Specs
- Color/Finish: Matte
- Base Color: Black
- Color/Finish: Fluorescent Yellow
- Shell Material: Polycarbonate
- Finish: Matte
- Features: Removable Cheek Pads
- Model: C91
- Product Name: Helmet
- Riding Style: Street
- Base Color: Yellow
- Internal Sun Shield: Smoke
- Size Group: Adult
- Communicator Compatibility: Compatible
- Features: Removable Liner
- Features: Vented
- Riding Style: Adventure Touring / Dual-Sport
- Color/Finish: Black
- Color/Finish: MC3HSF
- Features: Moisture Wicking
- Gender: Unisex
- Type: Modular
- Graphic: Nepos
- Units: Each
Frequently Asked Questions - HJC - C91 Nepos Modular Helmet - Black | Fluorescent Yellow | MC3HSF | Matte
How do I know if this part fits my vehicle?
Check the fitment information listed on this page against your exact year, make, model, and (where applicable) trim, engine size, or configuration. If your exact vehicle isn't listed, or you're not sure, use the product chat on this page or contact our support team before ordering - we're glad to help confirm fitment.
What does it mean if a product is listed as universal fit?
Universal fit means the product is designed to work across a range of vehicles, not that it's guaranteed to fit every one. Compare the listed measurements, mounting requirements, and connector or hardware specs against your specific vehicle before ordering, since some installations may need additional hardware or minor fabrication.
Where can I find installation instructions for this product?
General installation notes are provided above where available. For detailed step-by-step instructions, refer to the manufacturer's documentation included with the product, or use the product chat on this page for questions about difficulty, required tools, or whether professional installation is recommended.
What if I have more questions about this product?
Use the product chat on this page for fitment, specs, installation, and compatibility questions, or contact our support team directly for help before you order.
