🛵 Enhance Performance with GOOFIT Big Bore Cylinder Rebuild Kit for GY6 50cc 139QMB Racing Scooter Parts - 64mm Valve Upgrade Review

Works great but the piston rings broke off accidentally, the seller sent replacements promptly. Easy installation after detailed demo video on Youtube. You can't ask for more for €60.

I was a bit unsure about this kit but as soon as it came up I installed it. I've noticed a HUGE difference. feel like riding a motorcycle. better acceleration and top speed. Hills are no longer a problem. I recommend this for those who have these problems. I have an ICEBEAR scooter. worked great

Mounted on Jonway Solana 49cc moped. I've only ridden it a few days but everything installed great and the rocker arm replacement for the 69mm valve was included and installed well too. One alone provides a big power boost, even if all the other parts are stock. I intend to upgrade my carb and exhaust along with it but it already runs like a beast (40+ at part throttle, I'm pretty sure I'll get to 50-60 at full throttle after the engine breaks in). Not sure why the product comes with a stock…

I installed it on a 2014 Taotao CY50A 50cc moped. I've never done this before and it took about 3.5 hours from getting it in the mail to running it the first time. The kit came with everything I needed plus reels 9 grams. I didn't use reels but the kit did greatly increase launch and top speed and I am VERY HAPPY with this kit. I have a STOCK carburetor and STOCK exhaust, everything works great. The front end even lifts off the ground when you're not watching yourself. Make sure you have 64mm…

Okay so I ordered two new Taotao ATM 50s, my wife had a secret 63 because it was towed much quicker than mine. Then I bought a kit and carburetor from crappy Frog 72cc scooters. Large hole set. The crappy frog scooter kit leaked and I changed the seals twice, also the compression was very high and a lot came out of the breather tube. After the third analysis of crappy frog scooters! I figured I'd try another much cheaper large diameter kit and make it a little bigger, but I resorted to this kit

I have just over 100 miles on this set. My 50cc Tao Tao did 27 mph (40 mph on the odometer). With this kit and an improved and retuned carburettor it now tops out at 40mph (55mph on the odometer). Acceleration takes place day and night. I can take off quickly and move on. The hills are no longer a problem and there are many hills around me. Installing the kit was pretty easy. It took about 7 hours but I was very careful. My stock engine had 69mm valves and the kit requires 64mm valves. Since…

Installed almost 3 months ago. For the price it can't be beat. The hardest part was installing the small rings on the plunger and inserting the plunger into the glass, but other than that it was easy. The whole process from start to finish took about 4 hours. Make sure you have some good starting lube to cover the jug the piston slides into so you don't have trouble starting. I have no oil leaks and the power increase was felt the moment I started it. I was even a little scared it would fall…

Very good product. Trade Council here. The kit comes with an oil pump, just like the original. If your oil pump is working, simply set the oil pump aside and only install it when needed. Installed an A9 camera with this kit. recommend camera. The head is a small valve made of connector and valve cover (the valves are embedded in the hole and the hole covering the breathable dremel comes out of the cover and the dremel comes out of the hole. But avoid expanding the channels, there are very…