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  • GY 90cc Cylinder Head (50mm) EGR with 69mm Valve
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GY 90cc Cylinder Head (50mm) EGR with 69mm Valve - Model MIGY90-4002B-69V
GY6 cylinder head, 90cc cylinder head, 50mm cylinder head, 69mm valve, EGR cylinder head, 139QMB, 144QMC, 147QMD, new version, upgraded valves, scooter parts, GY6 engine  GY6 cylinder head, 90cc cylinder head, 50mm cylinder head, 69mm valve, EGR cylinder head, 139QMB, 144QMC, 147QMD, new version, upgraded valves, scooter parts, GY6 engine  Upgraded new version cylinder head for GY6 90cc scooter engines with 50mm bore. EGR design featuring longer 69mm valves for improved performance. Compatible with 139QMB, 144QMC, 147QMD engines. Direct OEM replacement with enhanced specifications.  GY6 90cc Cylinder Head 50mm EGR with 69mm Valve | New Version Upgrade 

GY 90cc Cylinder Head (50mm) EGR with 69mm Valve

  • Brand: Mortch Motor
  • Product Code: MIGY90-4002B-69V
  • Product Viewed: 110
  • Availability: In Stock
  • Weight: 1.07kg

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  • US$17.21


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There are 2 Cylinder Head versions being factory installed in GY6 scooter engines. They differ only in the valve length. The old version ships in almost all GY6 scooters and has a valve length of 64 mm. The new version has 69 mm.

⚠️ Important Selection Note: Please check your valve length and EGR configuration before ordering. Using the incorrect cylinder head version will result in improper valve operation and potential engine damage.
📋 GY90 Cylinder Head Options
Product Code Valve Length EGR Type Valves
MIGY90-4002A-69V 69 mm Non-EGR With Valves
MIGY90-4002A-69 69 mm Non-EGR Without Valves
MIGY90-4002A-64V 64 mm Non-EGR With Valves
MIGY90-4002A-64 64 mm Non-EGR Without Valves
MIGY90-4002B-69V 69 mm EGR With Valves
MIGY90-4002B-69 69 mm EGR Without Valves
MIGY90-4002B-64V 64 mm EGR With Valves
MIGY90-4002B-64 64 mm EGR Without Valves
Selection Guide: Choose based on your engine's valve length (64mm for older models, 69mm for newer models), whether you need EGR or Non-EGR, and if you prefer the head with valves pre-installed or without valves.
🔧 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.

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