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GOOFIT Performance Big Bore Cylinder Kit GY6 80cc 47mm for 139QMB ATV Scooter Moped Go Kart

Free shipping on orders over $29.99

$28.99

$ 14 .99 $14.99

In Stock
  • Inner diameter of cylinder: 47mm,outer diameter of piston pin: 13mm.
  • Replacement for gy6 49cc 50cc 60cc 80cc engine.
  • Made of high-strength aluminum alloy and wear-resistant coating, it has excellent high-temperature and wear-resistant performance, and its robust structural design is able to maintain stability under high loads and long-time running conditions, prolonging the life of the engine and reducing maintenance costs.
  • The installation process is simple and quick, without the need for complex modifications, allowing you to easily complete the engine upgrade and quickly improve the performance of your vehicle.
  • Products include cylinders, pistons, piston rings, piston pins, piston pin clips, valve seals, gaskets, tensioner gaskets, exhaust gaskets, intake and exhaust bolts, and exhaust nuts.



Product Description

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ZINE-ELABIDINE NASSIB
Reviewed in France on April 14, 2025
monté sur kymco agility 50, il ya 5 jours jusqu'à présent ça tient la route, n'oubliez pas d'augmenter le gicleur principal et changer l'huile après l'installation et aussi bien roder le kit
Allen 55
Reviewed in the United Kingdom on July 25, 2024
Very well finished components, fitted without issue and scooter runs well.
Cliente
Reviewed in Italy on July 23, 2024
Tutto ok vediamo quando durerà.
Timur Khvan
Reviewed in the United States on January 9, 2024
The quality of the big bore kit was fragile. It didn't last long
Ryan P.
Reviewed in the United States on March 31, 2023
Everything you need is included, no issues at all. Really improved the power on my Bintelli Escape, I can now climb hills with ease, no more holding up traffic haha
Customer
Reviewed in the United States on April 6, 2023
Bolted right onto a Wolf RX50, runs really well, hopefully it lasts longer then the factory piston did. Quality seemed as good as what came off, definitely more power . Kit came with everything in the pictures. I would recommend and buy again.
mirco
Reviewed in Germany on December 9, 2020
HALLO SOWEIT PASST ER ABER ICH BITTE UM ERSATZ DER DICHTUNGEN ,habe grossen oil verlust sprich es kommt aus der seite raus aber sonst ok.. hoffe auf ruckmeldung lg
Joel k.
Reviewed in the United States on November 18, 2020
Awesome big bore for my little roketa 50cc scooter, perfect mount up, casting could be a little better but nothing a dremel cant take care of, no mods to the stock carb and it fired and ran with no problems, so far so good, a little noticeable power gain, great price for a great product
Karen Clark
Reviewed in the United States on August 3, 2019
I have purchased two of these kits and installed both with great success. Three hours to do each one. Be aware, you should have some pretty good mechanical skills or it's not something to tackle. The quality of the parts is great. If it were labeled Honda for example, it would be a major purchase. We now can fly up hills that stopped us before. You will need the carb. Upgrade too or you will achieve nothing.
Captain Danny
Reviewed in the United States on July 14, 2019
50 cc tao tao is now 80 cc Took me about 4 hours to install . It was not to hard. My scooter has lots more power now. Faster stronger Better. Climbs hills at 40 mph. For only 28 bucks this was awesome.. Get one and put it on your scooter and go. You will easy pass them 50 cc scooters. Pass some cars too in the city
Ken Storey
Reviewed in Canada on April 9, 2019
It measures exactly the same as the 50cc set that I already have
somerandomeguyswoman
Reviewed in the United States on June 6, 2018
This big bore kit is really good quality. Ive put well over 400 hard (45MPH,7000RPM) miles on this along with a jetted carb, flat piston and upgraded transmission. Used factory head for higher compression, but i dont know if this will work on every gy6 as there are a few variations between the different brands. Only reason this is 4 stars not 5 is because it didnt come with a longer wrist (piston) pin even though its supposed to. I used the original one figuring it would be fine. BAD MISTAKE. shredded the piston. But the cylinder was fine. After i took it all apart again i got another piston and pin and since then its held up great. I love the quality that goofit produces, just wish they made sure they sent everything they say they do.
Dan McEvoy
Reviewed in the United States on August 23, 2017
Put on my taotao racer 50 50cc moped for a little more power and got exactly that. Fit perfect and works very well. I am gaveling aproblem with it warm starting but that's my fault as I dropped the carb and messed something up.