Yamaha Genuine Cygnus X Zuma BW'S 125 Standard Piston 5ML-E1631-10
Yamaha Genuine Cygnus X Zuma BW'S 125 Standard Piston 5ML-E1631-10
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Product Description
Brand new official Yamaha factory standard piston designed for 125cc four-stroke scooter engine overhauls. Precision-cast from advanced high-temperature aluminum alloy to exact factory standard specifications, engineered to deliver precise piston-to-cylinder wall clearance, optimal compression sealing, and long-term thermal durability under rigorous daily commuting conditions.
Vehicle Compatibility
Engineered explicitly for Yamaha modern classic four-stroke 125cc scooter and utility platforms.
Verified catalog fitment layout:
| Make | Model Family | Engine Type / Displacement | Model Years |
| Yamaha | Cygnus X 125 / NXC125 / Cygnus XC125 | 125cc (4-Stroke Air-Cooled / Fuel-Injected Scooter) | 2004–2012+ |
| Yamaha | Flame X 125 / XC125 | 125cc (4-Stroke Air-Cooled Scooter) | 2004–2006+ |
| Yamaha | Zuma 125 / YW125 / BW'S 125 | 125cc (4-Stroke Air-Cooled Scooter) | 2010–2021+ |
Fitment & Technical Details
Verify cylinder bore measurement is within standard factory limits and inspect for any ridge wear or scoring prior to assembly. Check piston ring end gaps and piston-to-cylinder wall clearance strictly to the factory service manual specifications. Liberally lubricate the wrist pin, small-end bearing (if applicable), piston pin clips, and ring lands with clean engine oil before final drop into the cylinder sleeve.Verification: Piston moves smoothly through the standard cylinder bore with exact factory-specified clearance, ensuring proper oil control, maximum compression, and reliable mechanical longevity.
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.
