Product Details
The HJC F31 Naby MC3HSF Yellow / Grey pairs HJC's fibreglass open-face design with a distinctive yellow and grey Naby graphic in a gloss finish. Its slim shell, extended cheek coverage and full-length clear visor support comfortable urban, scooter and touring use.
Who Is This Helmet For?
This colourway is aimed at riders who want the convenience and wide outlook of an open-face helmet with a brighter, more noticeable graphic. The integrated sun shield, moisture-wicking interior and SMART HJC preparation make it well suited to frequent road use.
Key Benefits
- Lightweight fibreglass construction: HJC's AFC shell is developed for a comfortable fit and balanced everyday performance.
- Clear road view: The long HJ-43 visor provides 99% UV protection, an anti-scratch coating and Pinlock-ready preparation.
- Adaptable glare control: The HJ-V12 internal sun shield has a dynamic multi-step adjustment.
- Managed airflow: HJC's ACS system channels air from front to back to help remove heat and humidity.
- Easy upkeep: The moisture-wicking crown liner and cheek pads can be removed and washed.
- Communication ready: Dedicated preparation accepts compatible SMART HJC 11B, 21B and 50B systems, sold separately.
Specifications
| Model and colourway | HJC F31 Naby MC3HSF Yellow / Grey |
|---|---|
| Helmet type | Open-face motorcycle helmet |
| Approval | ECE 22.06 |
| Outer shell | AFC Advanced Fibreglass Composite |
| Main visor | Clear HJ-43 Pinlock-ready visor with anti-scratch coating and 99% UV protection |
| Visor mechanism | Two-way pivot ratchet for smooth movement and improved sealing |
| Internal sun shield | HJ-V12 dynamic multi-step sun shield |
| Ventilation | ACS Advanced Channeling Ventilation System with front-to-back airflow |
| Interior | Moisture-wicking lining with removable and washable crown and cheek pads |
| Fastening | One-touch micro buckle |
| Communication compatibility | Prepared for SMART HJC 11B, 21B and 50B systems, sold separately |
| Warranty | Up to 3 years from purchase or 5 years from manufacture, whichever comes first |
HJC F31 Size Guide
Measure around the widest part of your head, keeping the tape level just above the eyebrows and ears. Use the measurement as a starting point because head shape and personal fit can affect the correct size.
| Helmet Size | Head Circumference |
|---|---|
| XS | 54-55 cm |
| S | 55-56 cm |
| M | 57-58 cm |
| L | 58-59 cm |
| XL | 60-61 cm |
| XXL | 62-64 cm |
What Is Supplied?
- HJC F31 Naby MC3HSF Yellow / Grey helmet
- Clear HJ-43 Pinlock-ready main visor, fitted
- HJ-V12 internal sun shield, fitted
Compatibility and Optional Accessories
The HJ-43 visor is prepared for a compatible Pinlock insert, but an insert is not listed by HJC as supplied with the F31. Compatible HJ-43 replacement visors, HJ-V12 sun shields and SMART HJC 11B, 21B or 50B communication systems are available separately. Check the exact model reference before ordering accessories.
Frequently Asked Questions
Is the HJC F31 approved for road use?
Yes. The F31 is certified to ECE 22.06.
Does the HJC F31 include a Pinlock insert?
No Pinlock insert is listed as included. The fitted HJ-43 clear visor is Pinlock-ready, allowing a compatible insert to be purchased separately.
Does it have an internal sun visor?
Yes. It uses HJC's HJ-V12 dynamic multi-step sun shield.
Can a Bluetooth intercom be fitted?
The F31 is prepared for HJC's second-generation SMART HJC 11B, 21B and 50B systems. The communication unit is not included.
Is the lining removable?
Yes. The crown liner and cheek pads are removable and washable.
HJC F31 Video
Watch HJC's official F31 video.
Moto Central Helmet Fitting Videos
Moto Central Fitting and Showroom Guidance
A helmet should feel evenly snug without isolated pressure points or movement when you turn your head. If you are uncertain about size or head shape, visit the Moto Central showroom for practical fitting guidance and the opportunity to compare suitable helmets.