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Yamaha FJR1300 / FZ1 / MT-07 Reservoir Diaphragm 5VS-25854-00
Yamaha FJR1300 / FZ1 / MT-07 Reservoir Diaphragm 5VS-25854-00
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Product Description This genuine Yamaha factory-original master cylinder diaphragm is a premium rubber seal designed for the front brake reservoir. It keeps air, humidity, and road grime out of your brake fluid, protecting the hydraulic system from moisture contamination which leads to spongy levers and reduced stopping power. The flexible, accordion-style expansion folds are designed to expand cleanly as brake pads wear down and reservoir fluid drops, preserving a perfect, vacuum-free seal.
Vehicle Compatibility
| Make | Model Range | Application |
| Yamaha | FJR1300 / FJR1300A (2003–2020) | Front Master Cylinder |
| Yamaha | FZ1 / FZ1 Naked / FZ1 Fazer (2006–2015) | Front Master Cylinder |
| Yamaha | FZ6 / FZ6R / FZ8 (2007–2017) | Front Master Cylinder |
| Yamaha | MT-07 / FZ-07 (2015–2021) | Front Master Cylinder |
| Yamaha | MT-09 / FZ-09 (2014–2020) | Front Master Cylinder |
| Yamaha | XT1200Z Super Ténéré (2010–2020) | Front Master Cylinder |
Note: This rectangular front master cylinder diaphragm is incredibly common across modern, high-displacement Yamaha sport, naked, adventure, and touring models. If you order this part number, Yamaha may supply the upgraded, fully interchangeable supersession part number 20S-25854-00.
Fitment Details This is a direct OEM replacement. Before installing the new diaphragm, clean the reservoir rim thoroughly to remove any crystallized brake fluid. Make sure the rubber gasket is completely dry before laying it flat and square into the reservoir top. Reinstall the plastic diaphragm guide bushing (if applicable) and screw down the reservoir cap evenly. Do not over-torque the mounting screws—this can pinch the rubber edges and cause slow fluid leaks onto your paintwork.
Important: Please ensure the part number matches your motorbike before purchasing. If you have any questions about the part or its compatibility, feel free to contact us. We’re here to help!
At Dmmotorcycles, we’ve specialized in vintage and vintage sports motorcycles and parts directly from Japan since 1998. We stock a wide selection of rare genuine and high-quality aftermarket parts and continually update our inventory to meet growing demand.
Looking for a specific part? Don’t hesitate to ask! We may have it in stock even if it’s not listed online. If not, we’ll do our best to source it for you.
We’re also happy to provide guidance on installation and offer excellent after-sales support to ensure your satisfaction.
Shipping Information
We ship worldwide, carefully inspecting and securely packing all parts to ensure safe delivery. Your order will be insured and shipped quickly, with the best available shipping option chosen for speed and reliability.
Please note:
- All parts are shipped from Cyprus (Europe).
- Customers outside the EU may incur additional import taxes based on the value of the item.
How we handle your order in 4 steps
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1. Order Verification
We confirm the order and make sure the correct part number, quantity, and any special requests match what’s on the sales confirmation
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2. Quality Check
Since our parts are new old stock we Inspect the parts for any defects, scratches, or missing components to ensure it meets quality standards. otherwise will notify you before proceeding with the order.
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3. Safe and Secure packaging
- Protective Wrapping: We use bubble wrap or foam padding to wrap the part, focusing on sharp edges or delicate components.
- Boxing: We place the wrapped part inside a sturdy box, filling gaps with packing materials to prevent movement.
- Sealing and Labeling: Securely tape the box and attach the shipping label, including orientation-specific markers like "Fragile."
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4. Finalizing of Shipment
We confirm the shipping address and contact details, give the package to the Post, keep the tracking number, and then send it to the customer along with the shipment notification.
