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62.5mm Bore Cylinder Head Valves Piston kit fit for GY6 177cc 1P63QML 4 Stroke Engine Chinese ATV Quad 4 Wheeler Go Kart Scooter

  • Based on 64 reviews
Condition: New
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$49.99 Why this price?
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Availability: In Stock.
Fulfilled by Amazon

Arrives Wednesday, May 20
Order within 15 hours and 19 minutes
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Size: 62.5mm Big Bore Cylinder


Features

  • 62.5mm Cylinder Head kit fit for GY6 177cc 1P63QML 4 Stroke Engine Chinese ATV Quad 4 Wheeler Go Kart Scooter
  • Package include:1*Cylinder Head, 1*Piston kit,Gaskets(As picture)
  • The measurement of the actual items may slightly different from the listing images due to manual measurement,please allow 0.5-1mm error.
  • High quality replacement parts.Easy To Install and Convenient To Use.
  • Safe transportation with reliable package, deserving your trust.

Manufacturer: ‎GOIRTUTSS


Brand: ‎GOIRTUTSS


Model: ‎1


Item Weight: ‎2.83 pounds


Package Dimensions: ‎7.95 x 5.6 x 4.5 inches


Item model number: ‎AMJX-MB2380


Exterior: ‎Machined


Manufacturer Part Number: ‎AMJX-MB2380


Date First Available: April 6, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, May 20

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
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Top Amazon Reviews


  • 50cc to 100cc
It fits just right
Reviewed in the United States on March 19, 2026 by Steven Chester

  • Doing good
Size: 52.4mm Cylinder Head
The media could not be loaded. Got this 52.4 Cylinder Head for my 125cc 4 stroke build. So far it’s working great, handling my idle power. Later on in a couple months I’ll come back for check up, praying to the Chinese gods their manufacturing is some what good. Easy to install? Just need to adjust your valve clearance to your liking. ... show more
Reviewed in the United States on February 21, 2026 by Joseph Z.

  • Works great
Size: 52.4mm Cylinder Head
Easy to install
Reviewed in the United States on December 14, 2025 by Duck lacy

  • False advertisement
Don't buy this is false information this is not a big bore kit this is a stock kit with other stuff mixed in one of the gaskets doesn't even go to qmb139 waist of money just stock kit
Reviewed in the United States on April 10, 2025 by Normand V.

  • Top end rebuild
Size: 52.4mm Cylinder Head
It truly came with everything you need to make it simple from getting it in just two days I always appreciate how fast stuff gets delivered and the customer service and the quality and prices are awesome it fit right on my 110cc and runs great
Reviewed in the United States on October 8, 2024 by Paul

  • It's not even a good repla
Size: 62.5mm Big Bore Cylinder
This is not at all a 62.5mm bore,, it's a 50mm bore
Reviewed in the United States on February 20, 2026 by Louie

  • IS NOT A BIG BORE KIT OF ANY SORT!!! False title/description.
Size: 62.5mm Big Bore Cylinder
This is a stock cylinder for a 1P63QML so three stars just cause they are kinda hard to find. This IS NOT a big bore kit of any sort and is a stock 62.5mm cylinder for a very specific 177cc gy6. It IS NOT a gy6 B or B-block cylinder and is not a gy6b/ B-block 57x57mm stud spacing' its 55mmx60mm spacing. It IS NOT 170cc or 180cc or 200cc. ... show more
Reviewed in the United States on July 23, 2023 by Jon Pippen

  • Price
Size: 52.4mm Cylinder Head
Everything fit good
Reviewed in the United States on February 1, 2025 by Amazon Customer

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