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Yamaha Hex Socket Brake Disc Bolt 90109-08718
Yamaha Hex Socket Brake Disc Bolt 90109-08718
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Genuine Yamaha hex socket button head bolt (Part Number: 90109-08718). This is a precision-engineered fastener widely used as a brake disc mounting bolt on high-performance Yamaha models.
Note: This part has been superseded by 90111-08084-00. You may receive the updated part number when ordering from OEM suppliers.
Vehicle Compatibility
| Model | Application |
| Yamaha RD500 / RZ500 | Rear Brake Disc |
| Yamaha FZR750 / 1000 | Front/Rear Brake Disc |
| Yamaha FZS600 Fazer | Brake System |
| Yamaha XJR1200 / 1300 | Brake System |
| Yamaha BT1100 Bulldog | Brake System |
Note: This bolt is highly specific to brake disc applications. Always check your model’s parts fiche to confirm if your bike requires this specific thread length and head style.
Fitment Details
When installing brake disc bolts, it is mandatory to clean the threads of both the bolt and the wheel hub. Apply a medium-strength thread locker (such as Loctite 243) to the threads to prevent loosening due to thermal expansion and vibration. Always tighten these bolts in a cross-pattern to the torque specification listed in your service manual to ensure even clamping pressure on the rotor.
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.