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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: Only 9 left in stock, order soon!
Fulfilled by Amazon

Arrives Wednesday, Jul 22
Order within 18 hours and 35 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, Jul 22

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
  • Affirm Pay in 4
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  • Zip Pay in 4
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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Bolted right on
Size: 57.4MM
Perfect match
Reviewed in the United States on May 30, 2026 by Don Duncan

  • 50cc to 100cc
Size: 69MM
It fits just right
Reviewed in the United States on March 19, 2026 by Steven Chester

  • NOT a big bore kit NOT a big bore kit
Size: 69MM
Wish I could rate zero stars. This is not a big bore kit. It’s a stock 40mm bore. Do not buy. Waste of money
Reviewed in the United States on May 29, 2026 Reviewed in the United States on May 29, 2026 by Nathan Pittman

  • 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

  • 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

  • Had to resurface the exhaust .. I wasn’t machined at all . Guess someone missed that Had to resurface the exhaust .. I wasn’t machined at all . Guess someone missed that
Size: 57.4MM
Works but kinda sketchy . I went from 52.4mm to this one .. 57.4 . So far I like it . But it’s been 2 hours .. 😂
Reviewed in the United States on May 1, 2026 Reviewed in the United States on May 1, 2026 by David Livingstone

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

  • 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

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