Your cart is empty.
Your cart is empty.Fit for Most Chinese import ATV scooter moped which equipped with 139qma and 139qmb engine.Such as Taotao Sunl BMS Roketa Kazuma Baotian Jonway etc
KEIFFY75 GAMES YT
Reviewed in the United States on August 12, 2024
Bore Kit arrived on time, was nothing wrong with it, and all the pieces were there, they all fit and went together fairly easy, Piston is made well, No more slowing down going up hills or when the wind blows, easily gained 20 MPH from this, the Difference in the Torc is amazing. I recommend this if your having slow issues!
Alexander Schump
Reviewed in the United States on December 12, 2024
Learned the hard way that if you don't orient the piston the right way, you will damage your piston sleeve and potentially have to buy an entire gasket set to tear down your engine to remove the bit of debris from your oil pump... Because it got clogged due to ignorance.Great product. I was the stupid one.
Kevin G.
Reviewed in the United States on June 27, 2022
I like the price used for rebuild on 50cc gy6
keith hoggard
Reviewed in the United States on May 22, 2021
WORKS GOOD I CAN START IT WITH KICK START NOW AND IT WILL START WITH OUT TOUCHING THROTTLE
Jason McLaughlin
Reviewed in the United States on November 20, 2021
I liked that it came kind of quick I just liked and disliked that after two days of riding it the piston rings burnt out burnt up which messed up my valvesI’ve done this to another company and now big bore kit still running like a champ so that that was pretty much a waste of time and money and I hate running bad reviews
Joseph Baker
Reviewed in the United States on June 7, 2020
Missing an exhaust bolt, other than that was a decent kit
John L. Painter
Reviewed in the United States on September 17, 2019
I needed this for a Dongfang SST DF50 I’m dual-sporterizing. Good quality on the kit package (not fancy) but it’s how parts fit and work, it installed well, everything lined up and certainly makes a difference on the 49cc. It’s very worth your while to upgrade. You’ll also need a bigger carb to get the full effect and probably new weights in the variator.
Jenna Smeltzer
Reviewed in the United States on November 20, 2019
My scooter only went 30 mph befor now it does 55 mph and does wheelies you can’t beat it for the price and it’s been running fine for 1,000 miles now
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