HJC F31

The HJC F31 is an ECE 22.06 open-face motorcycle helmet with an Advanced Fibreglass Composite shell, a full-length HJ-43 outer visor and an adjustable HJ-V12 internal sun shield. Its open chin area suits riders who prefer a broad field of view and straightforward access for commuting, scooter use and relaxed road riding.

Moto Central's F31 collection combines solid and graphic helmets with the clear replacement visor and DKS531 Pinlock 70 inserts made for the HJ-43 system. The finish and size availability vary between products, while the helmet construction and core features remain shared across the range.

HJC F31 features at a glance

HJC's ACS ventilation layout directs air from the front towards the rear of the helmet to help move heat and humidity while riding. Actual airflow will change with road speed, screen height, head position and weather, so make sure the vent controls remain clear and easy to operate.

The moisture-wicking crown liner and cheek pads are removable and washable. HJC also provides integration for its second-generation SMART HJC 11B, 21B and 50B communication systems, each sold separately.

Is an open-face helmet right for your riding?

The F31's open design gives an unobstructed feel around the mouth and chin while its long outer visor covers the face from wind, rain and insects. It can suit urban journeys, scooters and riders who value easy communication at stops.

An outer visor does not turn an open-face helmet into a full-face helmet. The F31 has no protective chin bar, so the lower face remains more exposed than it would be inside a full-face or closed flip-front design. Choose the format with that difference clearly understood.

Choosing the correct F31 size

HJC lists the F31 from XS to 2XL, covering head measurements from 54 to 64 cm. Some graphics, including selected pink finishes, have a shorter size run. Measure around the widest part of the head just above the eyebrows and ears, then compare the result with the current manufacturer chart and our motorcycle helmet sizing guide.

The helmet should feel evenly firm around the crown and cheek area without a concentrated pressure point. With the micro buckle secured, gently rotate the shell: the skin should move with the lining rather than the helmet sliding independently.

Check the fit with both visors raised and lowered. The clear shield should travel freely without touching the nose, spectacles or face, and the internal sun shield should deploy without obstructing vision. If fitting a communication system, position the speakers without creating pressure against the ears.

HJ-43 visor and two-way pivot system

The HJ-43 is the F31's external clear visor. HJC specifies 99% UV protection, an anti-scratch coating and preparation for an anti-fog insert. Its two-way pivot ratchet is designed to move the shield smoothly and draw it into its sealing position as it closes.

A clear HJ-43 replacement visor appears in this collection alongside the helmets. Check the HJ-43 code before ordering because a visually similar HJC open-face visor may use different pivots, curvature or seals.

The separate HJ-V12 dark smoke sun shield sits inside the helmet and can be adjusted through multiple positions. It is intended for bright conditions and does not replace the clear external shield. Raise it when light levels fall and keep both visor surfaces clean with suitable products.

DKS531 Pinlock inserts

The clear and dark smoke DKS531 Pinlock 70 MaxVision inserts in this collection are shaped for the Pinlock-prepared HJ-43 outer visor used by the F31 and i31. The insert mounts inside the visor and creates an insulating air pocket to help reduce condensation.

Pinlock-ready describes the visor's preparation; it does not by itself confirm that an insert is supplied with every helmet. Check the exact F31 product's box contents before ordering an additional insert. A DKS531 cannot be fitted correctly if the visor lacks the required locating pins or has been replaced with a different visor model.

A dark smoke insert changes the light reaching the rider and should be selected for appropriate conditions. It is not the same component as the internal HJ-V12 sun shield. For more model-specific parts, browse helmet spares and accessories.

Ventilation, lining and Bluetooth preparation

The ACS channels depend on open, unobstructed intake and exhaust points. In cool or wet conditions, useful ventilation and a correctly installed Pinlock insert can work together to manage internal condensation. Neither will remove water or road contamination from the outside of the visor.

Remove and refit the crown and cheek pads according to HJC's instructions. Wash gently, rinse away residue and allow the components to dry naturally. Avoid solvents, fuel, aggressive cleaners and direct heat around the shell, protective liner, visor and comfort materials.

The F31 is prepared for SMART HJC 11B, 21B and 50B systems, but the intercom is not included. Route wiring behind the comfort lining, keep it clear of the retention system and never cut or compress the protective structure to make a unit fit.

Why buy an HJC F31 from Moto Central?

Moto Central groups the available F31 solids and graphics with the model's clear HJ-43 visor and DKS531 inserts, making it easier to compare helmet sizes and identify accessories by their correct codes. Our team can help assess fit, explain the difference between the two visor layers and check whether an open-face format provides the coverage you expect.

If the F31 is not the right shape or style, compare more open-face motorcycle helmets, view the broader HJC helmet range or browse all motorcycle helmets.

Customer questions