Just One J40 Graphic Motocross Helmet - Blue

The Just One J40 Graphic Motocross Helmet offers a robust safety solution for riders, meeting the ...

Best current price£124.60from OnBuy.com

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OnBuy.com(S) Just1 J40 Motocross Helmet Flash White / Blue Blue,White 8056893364059
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£124.60
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Demon TweeksJust One J40 Graphic Motocross Helmet - X-Large (61-62cm) - Flash White / Blue, Blue/white
£7.94 delivery
£149.99
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Product Information

Full details

The Just One J40 Graphic Motocross Helmet is designed for adult dirt track riders seeking a blend of high-impact protection and long-ride comfort. Certified to the rigorous ECE 22/06 safety standards, this helmet features a robust ABS shell and an advanced ventilation system to keep riders cool under pressure; however, riders should note that its specialized design is primarily optimized for motocross activities rather than casual street riding.

All features

Age Groupadult
ColourBlue
GenderUnisex
Model Part NumberJUS402S
BrandJust One

Extended Product Information

FAQs

Does this helmet meet the latest safety standards?

Yes, the J40 meets the ECE 22/06 standard, which is one of the most recent and rigorous safety requirements.

How do I clean the liner?

The lining features Protx2 technology; it is removable and should be hand-washed with mild soap and air dried.

Is this helmet suitable for street riding?

While it provides high levels of protection, it is designed specifically for motocross and lacks the noise insulation and aerodynamic profile of dedicated street helmets.

What is the benefit of the Peak Release System?

It is designed to snap away in the event of an impact, reducing the rotational forces transmitted to the rider's neck.

Are replacement liners available?

Yes, replacement liners can typically be ordered through authorized Just One dealers if your current one requires replacement due to wear.

How tight should the strap be?

The strap should be pulled tight enough through the Double D rings so that you can fit no more than one or two fingers between the strap and your chin.

Troubleshooting

Interior lining feels loose after several uses

Remove the liner and check that all snap-in anchor points are fully pressed into the shell receptacles.

Difficulty breathing during intense track sessions

Ensure all front air intakes are free of dirt and debris; use compressed air to clear the mesh screens.

Strap feels uncomfortable under the chin

Adjust the position of the comfort sleeve on the strap so it sits directly between the chin and the webbing.

Pros and Cons

Pros

  • Meets the latest ECE 22/06 safety certification
  • Advanced antimicrobial liner prevents odor buildup
  • Comprehensive airflow system with chin bar ventilation
  • Secure Double D retention strap
  • Robust ABS shell construction for impact absorption

Cons

  • Specific design optimized for motocross, less versatile for touring
  • High-speed wind noise is common in all motocross-style helmets
  • Limited to off-road utility

Setup, Compatibility & Care

To ensure maximum safety, always verify the helmet sits level on your forehead. To clean the helmet, remove the interior lining and hand-wash it using a mild detergent, allowing it to air dry fully before reinserting. The shell should be cleaned with a soft, damp cloth and mild soap; avoid harsh chemical cleaners that can degrade the protective finish. Check the peak and visor mounting hardware periodically to ensure everything is tightened, and always inspect the Double D strap for any signs of fraying or wear before every ride.

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