BMW R18 Fuel Cap Le Billet | FCR Accessories

A CNC-machined fuel cap for the BMW R18, designed as a true finishing mechanical component

The Le Billet fuel cap for BMW R18 replaces the original part with a precision-machined component designed to enhance perceived quality and finishing coherence at the top of the tank. On a platform where volumes are bold and highly exposed, this visual and functional contact point deserves a part that matches the overall presence of the motorcycle.

The design combines precise machining and rigid materials to ensure consistent seating and smooth closing over time. The peripheral knurling provides a firm grip for everyday use, especially with gloves or in wet conditions. Opening and closing gain in control, delivering a more mechanical and substantial feel compared to a standard cap.

The internal system integrates a spring-loaded valve and ventilation ports. This architecture manages pressure variations caused by fuel thermal cycles while maintaining controlled tank ventilation. Sealing is ensured by a petrol-resistant O-ring designed to withstand prolonged contact with fuel, maintaining a clean and reliable closure over time.

In terms of integration, the cap follows a discreet yet distinctive customization approach, bringing a more technical finish to a highly visible area. Depending on the R18 configuration, it can reinforce a full-black setup, maintain an aluminum contrast, or introduce a more pronounced accent through detail finishes.

Installation is a direct replacement of the original cap, requiring no modifications, ensuring a fully reversible fit consistent with OEM assembly.

Need advice to validate your configuration (controls, routing, installation)? Our FCR Accessories team is available at +33 5 49 62 03 26 or by email.

The advantages of the BMW R18 | Fuel Cap Le Billet

Precision-machined aluminum and aviation-grade brass

The Le Billet fuel cap is manufactured from 6061-T6 aluminum and aviation-grade brass, materials selected for their mechanical strength and thermal stability. CNC machining ensures perfect dimensional accuracy and a premium-level finish consistent with the BMW R18’s high-end character.

Effective knurled ergonomics

The upper cap features precision knurling to provide excellent grip. This design improves handling during opening and closing, even when wearing gloves or in wet conditions. Daily use remains smooth, intuitive, and secure.

Optimized sealing and pressure management

The cap integrates a petrol-resistant O-ring ensuring reliable sealing over time. Its internal spring-loaded valve connected to three vents allows controlled tank pressure regulation, preventing overpressure while maintaining safe and efficient fuel system operation.

Frequently asked questions about THE BMW R18 | Fuel Cap Le Billet

❯ Is this fuel cap compatible with all BMW R18 models?

The Le Billet fuel cap is designed specifically for the BMW R18 platform. It is important to ensure that your model uses the same thread type as the standard R18 version before installation, particularly for Classic, Bagger, or Transcontinental variants.

❯ Does installation require any modification to the tank?

No. The cap directly replaces the original BMW R18 fuel cap. It screws onto the existing thread without any modification or adaptation to the tank.

❯ Is the cap perfectly sealed?

Yes. It integrates a fuel-resistant O-ring that ensures optimal sealing. The internal spring-valve system also provides safe management of internal tank pressure.

❯ Is the black finish paint or anodizing?

The black finish is anodized to ensure excellent resistance to weathering and wear. It is designed to maintain its appearance over time, even with regular use.

❯ Does the cap include a ventilation system?

Yes. It features a spring-loaded valve connected to three vents, allowing controlled pressure release and preventing internal tank overpressure.

❯ Does this cap improve motorcycle performance?

Its primary purpose is aesthetic and qualitative. It does not increase engine performance but enhances the overall finish and visual coherence of the BMW R18.

French craftsmanship and know-how signed by FCR Accessories

The FCR Accessories Workshop

The artisanal heart of our expertise

All our accessories are imagined, developed and handmade in our FCR Accessories workshop, directly derived from the FCR Original preparation department. As the beating heart of our company, this workshop concentrates all the know-how of our craftsmen and technicians. Each piece is adjusted with precision, designed to combine aesthetics, performance and durability. Nothing is left to chance: from material cutting to final assembly, each step reflects the passion and high standards that have built FCR Accessories' reputation in the high-end motorcycle world.

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FAQ - DELIVERY & ORDERING

What are your shipping times?

All our orders are prepared in our workshop in France.

Shipping takes place within 24 to 48 business hours after order confirmation.

What are the delivery times?

France : 2 to 4 working days via Colissimo tracked, Mondial Relay or UPS.

Europe : 3 to 7 business days.

International : 5 to 10 working days depending on the destination.

Do you offer order tracking?

Yes, each customer receives a personalized tracking number by email as soon as the shipment is dispatched.

You can track the delivery of your package in real time.

Which carriers do you use?

We collaborate with premium carriers (Colissimo tracked with or without signature, Mondial Relay, UPS or Fedex depending on destination and customer choice) to guarantee speed and security.

Are your products well protected?

Each order is carefully prepared and shipped in secure and discreet packaging , specially designed to protect your items during transport.

Do you ship internationally?

Yes, we ship our products worldwide. Shipping costs and delivery times vary depending on the destination and are shown when you check out.

Please note that for deliveries outside the European Union (e.g., United Kingdom, Switzerland, United States, Canada), local taxes, customs duties, or brokerage fees may be applied by the authorities or the carrier. These charges are not included in the displayed price and remain the responsibility of the customer.

Please consult our FAQ section or our Terms and Conditions for more information.

Is VAT included in your prices?

Yes, VAT is included for all orders delivered within the European Union.

Business customers can enter their intra-community VAT number when ordering to check if an exemption applies.

For deliveries outside the European Union (e.g., United Kingdom, Switzerland, United States, Canada), local VAT, customs duties, or brokerage fees may be levied upon arrival by the authorities or the carrier. These charges are not included in our prices.

Please consult our FAQ section or our Terms and Conditions for more information.

What payment methods do you accept?

We accept bank cards (Visa, Mastercard, etc.), PayPal, PayPal Express, Paypal x4 (no fees), Alma payment in installments, as well as other secure methods available depending on your country.

Why choose FCR Accessoires

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French manufacturing

Designed, manufactured and assembled in Poitiers, France, in our FCR Accessoires workshops, following the finest French craftsmanship standards.

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Plug & play installation

Easy and quick installation, with no cutting or welding required. Each kit includes instructions, mounting hardware and necessary accessories.

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Quality and durability

Premium materials (stainless steel, aluminium, epoxy-coated steel) and flawless finishes ensure exceptional resistance and longevity.

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Developed with passion

Every accessory stems from our FCR Original motorcycle expertise - combining performance, design and innovation.

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Worldwide delivery

Fast and secure worldwide shipping, with careful packaging and full tracking of your order.

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Passionate customer service

Our team of enthusiasts advises and supports you every step of the way, before and after your purchase.

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Exclusive expertise

Parts made with the same precision as our FCR Original motorcycles - created to enhance your machine with authenticity.

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Design and innovation

Our design and engineering teams develop exclusive accessories that combine style, ergonomics and performance.

BMW R18 | Fuel Cap Le Billet

A CNC-machined fuel cap for the BMW R18, designed as a true finishing mechanical component

The advantages of the BMW R18 | Fuel Cap Le Billet