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Piaggio 50cc / 100cc 4T 2V Flywheel Magneto Rotor 969243
Piaggio 50cc / 100cc 4T 2V Flywheel Magneto Rotor 969243
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Product Description
This is a genuine factory-original Piaggio generator rotor (flywheel magneto). It features integrated permanent magnets that spin around the stator coils to generate the electrical current required for the ignition system and battery charging circuit. This specific rotor is engineered exclusively for Piaggio Group's air-cooled 50cc and 100cc 4-stroke, 2-valve (4T 2V) hi-per4 engine blocks.
Note: This component does not fit newer 3-valve (3V) iGet engines, 4-valve (4V) variants, or any 2-stroke models. It replaces legacy Aprilia part number AP8551077.
Vehicle Compatibility
This flywheel is widely used across Piaggio, Vespa, Aprilia, and Derbi 4T 2V platforms:
| Make | Model | Model Year Range | Application |
| Piaggio | Zip 50 4T 2V / Zip 100 4T | 2000–2018 | Flywheel Magneto Rotor |
| Piaggio | Fly 50 4T 2V / Fly 100 4T | 2005–2015 | Flywheel Magneto Rotor |
| Piaggio | Liberty 50 4T 2V / Liberty 100 4T | 2003–2016 | Flywheel Magneto Rotor |
| Vespa | LX 50 4T 2V / ET4 50 / S 50 4T | 1998–2012 | Flywheel Magneto Rotor |
| Aprilia | Sport City One 50 4T 2V / Scarabeo 100 4T | 2008–2014 | Flywheel Magneto Rotor |
| Derbi | Atlantis 50 4T / Boulevard 100 4T | 2002–2014 | Flywheel Magneto Rotor |
Fitment Details
To access the flywheel, remove the cooling fan shroud and the plastic fan blades from the right side of the engine casing. Use a dedicated 26mm x 1.0mm right-hand thread flywheel puller tool to pop the rotor off the tapered crankshaft spindle; never hit the rotor with a hammer, as this will shatter or weaken the internal permanent magnets. Before sliding the new rotor into place, clean the crankshaft taper thoroughly to remove any oil or grit, and verify that the woodruff key is seated securely in its slot. Slide the rotor on, align the keyway, thread the retaining nut by hand, and torque it to the factory specification of 40–44 Nm while holding the flywheel steady with a proper universal holding tool.
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.