
HJC I91 Plain Motorcycle Modular Helmet
11 December 2025
MT Dark Visor for MT Stinger 2 (MT-V-28B)/Braker
11 December 2025MT Thunder 4 Lumin Motorcycle Full Face Helmet White Blue Red
MT Helmets Thunder 4 SV – Sport-Touring Excellence
The Thunder 4 SV stands at the top of MT Helmets’ sport-touring range, offering exceptional performance, comfort, and value. Engineered for long-distance riding, it delivers outstanding ergonomics, enhanced safety features, and a broad field of vision — all while maintaining an eco-conscious design for long-term durability.
Optimised for Performance & Comfort
Crafted for sport-touring riders, the Thunder 4 SV is built with HIRP (High Impact Resistance Polymer), striking the perfect balance between weight and safety. Its interior features removable, washable, and hypoallergenic liners, ensuring a fresh and hygienic ride on every journey.
Advanced Ventilation & Vision
Developed using fluid dynamics, the helmet’s airflow channel system delivers maximum ventilation with minimal drag. The wide-view face shield comes equipped with a Pinlock 100% MaxVision anti-fog lens for clear vision in all weather conditions, while the improved retractable sun visor offers full coverage and UV protection.
Quick, Safe, and Smart Design
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MT-QVSS (Quick Visor Swap System): Easily change visors in seconds — even with the helmet on.
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Emergency Release System: Allows safe and fast removal in the event of an accident.
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Shield Lock: Prevents accidental visor opening during impact.
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Reflective Fabric: Increases visibility during night rides.
Communication-Ready & Eco-Conscious
The Thunder 4 SV is Bluetooth-compatible and features a dedicated intercom compartment designed for UCS (Universal Communications System) intercoms — the new industry standard. Designed with sustainability in mind, its modular components can be easily replaced to extend the helmet’s lifespan and reduce environmental impact.
Safety & Certification
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Micrometric buckle with double-tooth retention for secure fastening
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3-Point Protector System to prevent wear and improve hygiene
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Certified to ECE 22.06 safety standards
Specifications
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Shell Material: HIRP
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Visor: MT-V-28B
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Pinlock Insert: DKS435
| Color | Black, Red, White/Blue/Red |
|---|---|
| Size | 2XL, 3XL, XS, M, XL, S, L |
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