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Your cart is empty. 1.Brand New Products with High Quality
2.Upgrade GY6 155cc 58.5mm Cylinder Kit for 152QMI 157QMJ Engine
3.This Parts Fit Most of Chinese Made Scooters and ATVs.Such as JONWAY,JMSTAR,ROKETA,SUNL,TANK,PEACE,TAOTAO
egreen
Reviewed in the United States on February 8, 2025
Purchased this kit in 2020 and worked fine. Lost compression so decided to purchase same kit again, but after assembling, the piston hits the crankshaft and will not allow full revolutions. Piston is visibly different on the new kit vs. the old kit.
Roger Henderson
Reviewed in the United States on June 28, 2024
Much better then the last one I purchased piston fit good ran great I would recommend it. Just reused head there was no issues with mine
Jake Giddens
Reviewed in the United States on May 11, 2023
Items where of great quality but instead of the pictured g clips for the thrust bearing I got floating clips. They work the same just not as easy to install. Still breaking in the engine.Update: 15 miles into break in 1/4 throttle rides a compression ring borke in half. Checked my oiling system and its working great. I was using over sized jets for the break in so it wouldnt be lean. So heat and fuel where not a issue. Sadly you get what you pay for.
Evan D
Reviewed in the United States on March 18, 2023
Everything went together smoothly and was great value for the price. Will recommend.
Dave
Reviewed in Canada on August 22, 2022
Check your piston. This one was an exact match for my engine. This one lined up with the valves perfectly. Others had different valve profiles in the piston.
bryan s.
Reviewed in the United States on January 3, 2022
It seems to be a good product for the little time it’s been on
Steve Leduc
Reviewed in Canada on July 31, 2021
Seems ok. rings are very hard to clock mark the oil rings. exhaust gasket is useless unless you use sealant. In fact all the gaskets were sub OEM and wound up replacing them with higher quality.
TrailBoss123
Reviewed in the United States on September 4, 2019
When I first rebuilt my gy6 150cc motor I had low compression and excessive oil in the cylinder. I tore the engine apart again and found that my piston rings were installed upside down. I flipped them over the right way and the engine has 155psi compression and no oil problems. The motor runs great after 3 hours or so of run time. You DO NOT need to bore the case on your motor with this kit which as also really nice. You will almost certainly need to rejet your carb. I used a #125 main jet with this big bore kit, performance head, nibbi intake, and straight through exhaust.
Customer
Reviewed in the United States on December 2, 2019
Worked great and added some extra power. After a few hundred miles my scooter is starting to get some piston slap and the engine is getting loud. Didn’t seem like the best quality but I threw it together anyway. I have built multiple motorcyle engines and scooter engines not an install error
Tarren santero
Reviewed in the United States on October 9, 2019
So far it’s bolted right up with no problems and it runs great now it’s time to see how long it last, but overall a great kit for the price
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