GY6 8 Pole Rotor

Brand: Mortch Motor
Product Code: MIGY125-3041

Product Viewed: 131

Availability: In Stock

Weight: 0.84kg

Packing Size: 12.00 x 12.00 x 6.00cm

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This is a replacement 8-pole rotor (magneto flywheel) specifically designed for GY6 50cc 4-stroke engines (139QMB). The rotor is a critical component that works with the stator to generate electrical power and provides the magnetic trigger for the ignition system.

⚙️ Specifications

Type: 8-Pole Rotor

Engine Compatibility: GY6 50cc 4-Stroke

Engine Code: 139QMB, 139QMA

Mounting: Tapered shaft with woodruff key

⚠️ Critical Warning: Weak magnetization can cause faulty running, misfiring, or no spark. Damaged rotors (sheared keyway, bent shaft, cracked magnets) can cause severe engine damage, timing issues, and abnormal noise. Always inspect your rotor carefully during installation.

GY6 50cc 8-Pole Rotor Flywheel Magneto 139QMB 4-Stroke

🔧 Mechanic's Note: The 8-pole rotor is specifically designed for 50cc GY6 engines. Common signs of rotor failure include: hard starting, erratic running, loss of spark, and metallic knocking sounds from the stator area. If you're replacing your stator or pickup trigger, it's recommended to inspect the rotor magnets for cracks or loss of magnetism.

⚠️ Installation Tip: Always ensure the woodruff key is properly seated before tightening the rotor nut. Torque to specification (typically 35-40 ft-lbs). Do not hammer the rotor onto the crankshaft - this can damage the magnets and crank bearings. Verify that this is an 8-pole rotor (count the magnets) before installation to ensure compatibility with your stator.

🔧 Compatibility Notice

Please verify that this part fits your specific vehicle model and year. Many vehicles share similar names but use different components depending on year or market region.
We strongly recommend cross-checking with your vehicle's owner's manual or contacting us for confirmation before placing your order.

📄 Product Disclaimer

Product images, measurements, and descriptions are for reference only. Slight variations in color or appearance may occur due to manufacturing batches or photography lighting—functional specifications remain identical to the ordered part.
Professional installation is mandatory. Mortch Motor assumes no liability for damages, injuries, or losses resulting from improper installation, misuse, unauthorized modification, or abnormal operation.

💰 Import Duties & Taxes

All listed prices EXCLUDE shipping costs, import duties, taxes, and customs clearance fees. These charges (if applicable) are determined and collected by your local customs authority and are solely the buyer's responsibility.
In case of return due to unpaid duties/taxes or refusal to clear customs, the buyer shall bear the original shipping cost, return shipping fees, and any associated administrative charges deducted from the refund.

📌 Order Confirmation: By completing your purchase, you acknowledge that you have read, understood, and agreed to all terms above. For any questions, please contact our support team prior to ordering.