Yamaha Genuine Passol II Crankcase 25K-15120-01
Yamaha Genuine Passol II Crankcase 25K-15120-01
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Product Description
Brand new official Yamaha factory matched crankcase assembly designed for classic vintage 50cc two-stroke micro-scooters. Precision-cast from high-grade lightweight aluminum alloy and factory-machined as a matched set to ensure exact alignment of the crankshaft journals and transmission gear shafts, engineered to restore structural integrity and provide a flawless foundation for a complete engine restoration.
Vehicle Compatibility
Engineered explicitly for Yamaha classic air-cooled two-stroke micro-scooter platforms.
Verified catalog fitment layout:
| Make | Model Family | Engine Type / Displacement | Model Years |
| Yamaha | Passol II (SA50 / 25K series) | 50cc (Air-Cooled 2-Stroke Scooter JDM) | Early 1980s–1985 |
| Yamaha | Related Early JDM 50cc Scooter Variants | 50cc (Air-Cooled 2-Stroke Scooter) | Early Era |
Fitment & Technical Details
Thoroughly inspect all internal oil passages, threaded stud holes, and bearing seats for shipping debris or oxidation prior to assembly. Install new crankshaft main bearings and oil seals using a proper driver press tool, ensuring the matched case halves align perfectly with their locating dowel pins before torquing case bolts in a criss-cross sequence to factory specification.Verification: Crankcase halves mate flush with zero gasket-surface gap, and installed main bearings spin true and smooth with absolute coaxial alignment.
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.
