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GY6 50cc 60cc 80cc Inlet/Exhaust Valve 64mm - Model MIGY50-4027B-64
High-performance inlet/exhaust valve set 64mm for GY6 50cc-100cc 4-stroke engines. Increases torque and acceleration. Fits all 50cc-100cc cylinder kits including original restricted engines. Compatible with 139QMB, 152QMI engines. Improves running smoothness while maintaining durability. Model: MIGY50-4027B-64.  GY6 50cc 60cc 80cc Inlet/Exhaust Valve 64mm - Performance Valve Set | 4-Stroke 

GY6 50cc 60cc 80cc Inlet/Exhaust Valve 64mm

  • Brand: Mortch Motor
  • Product Code: MIGY50-4027B-64
  • Product Viewed: 143
  • Availability: In Stock
  • Weight: 0.06kg
  • Packing Size: 12.00 x 4.00 x 4.00cm

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  • US$1.86 267 SOLD


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One of the cheapest ways to get real performance tuning. Working closely together with various 4-stroke scooter manufacturers, we have managed to increase engine performance and running smoothness. The result does not affect everyday drivability while still offering smooth running and durability.

✅ Performance Upgrade: The Valve sets can, of course, be used with original (restricted) engines. Its strongest point is that it provides higher torque which translates into better acceleration. It fits all 50cc - 100cc cylinder kits.
⚙️ Wide Compatibility: This valve set fits all 50cc - 100cc cylinder kits.
📏 Valve Length Options
Standard Version
64 mm
Installed in almost all GY6 scooters
View Product
New Version
69 mm
For newer GY6 engine variants
View Product
⚠️ This valve set is available in two versions: 64mm valve length (standard in almost all GY6 scooters) and 69mm valve length (newer version). Please check your valve length before ordering.
🔧 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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