Trkimal Performance Upgrade Big Bore Cylinder Kit GY6 80cc 47mm for GY6 49cc 50cc 139QMB ATV Scooter Moped Go Kart
Trkimal Performance Upgrade Big Bore Cylinder Kit GY6 80cc 47mm for GY6 49cc 50cc 139QMB ATV Scooter Moped Go Kart
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Trkimal Performance Upgrade Big Bore Cylinder Kit GY6 80cc 47mm for GY6 49cc 50cc 139QMB ATV Scooter Moped Go Kart

|7 ratings

Key item features

  • Precise Cylinder: Features a 47mm inner diameter cylinder for accurate fitment and optimal performance.
  • Engine Upgrade: Designed for easy installation to upgrade GY6 50cc engines to 80cc, significantly enhancing power.
  • Comprehensive Components: Includes a cylinder, piston, piston ring, piston pin, piston pin clip, valve oil seal, and various gaskets.
  • Essential Hardware: Comes with a tensioner gasket, exhaust gasket, intake and exhaust studs, and an exhaust nut for a complete setup.
  • Broad Compatibility: Fits most Chinese-made scooters and ATVs equipped with a GY6 50cc engine.
  • Performance Enhancement: Transforms engine functionality by increasing displacement from 50cc to 80cc.
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Current price is $24.97
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Sold by taizhou city chuangtong trade co.,ltd
Fulfilled by Walmart
4.096551724137931 stars out of 5, based on 145 seller reviews(4.1)
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3.3 out of 5 stars
stars7 ratings4 reviews
How item rating is calculated
  1. 5 stars43% (3)
  2. 4 stars14% (1)
  3. 3 stars0% (0)
  4. 2 stars14% (1)
  5. 1 star29% (2)

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Showing 1-3 of 4 reviews

May 6, 2026
Jason
Sold bytaizhou city chuangtong trade co.,ltdDelivered byWalmart
5 out of 5 stars review

Verified Purchase

Added speed and power!

I see everyone complaining about this kit because it broke or screwed up their engine. I installed mine and it works amazingly! I went from 35 mph with the original 50cc to 50 mph with this big bore kit, and I'm a big guy. I also added a bigger carburetor to be able to keep up with the upgrade.

Helpful?2IQWIZFCR4AH215355814
Jan 2, 2026
THOMAS
Top Reviewer
Sold bytaizhou city chuangtong trade co.,ltdDelivered byWalmart
5 out of 5 stars review

Verified Purchase

excellent service and affordable service

Helpful?2IQWIZFCR4AH215355814
Jul 15, 2025
anonymous
Sold bytaizhou city chuangtong trade co.,ltdDelivered byWalmart
1 out of 5 stars review

Verified Purchase

it brew up in just a day

it Brew up in just a day i would like the money back or a new kit

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