🛵 Enhance Your GY6 Moped Scooter Engine with 69mm Valve Big Bore Kit 100cc – Complete Upgrade Set with Racing CDI, Ignition Coil, and Performance Spark Plug Review

I like the product, solo and rrrr grab, piston 69 mm and las anillas le qyedan grandes, impossible instskar con ese defective. Photo unit 2.

I wanted to get the 50ccm, but ordered it by mistake. Wanted to go back but decided to install. As Bob Ross said, happy mistakes! :)

Works great and everything mechanically ok but my head gasket actually blew and the gasket between the can and the base is leaking oil isn't properly sealed

This is my second kit I have bought from them and they are great they are high quality and include everything you need and more. Just make sure you get the correct valve length

The first installation worked great. Everything is according to the specifications of my 139qmb 50cc block. I drive every day, have driven more than 2000 km without any problems. I will most likely buy another one to carry my other scooter. Definitely recommend this BBC.

I would like a replacement I was a little disgusted that I dropped the valve, this is my only transport and now I have to rebuild again! I'd like someone to get in touch with me about this, my vehicle is practically a pile of metal now.

Very simple. I used a 2019 Tao Tao 50 on my pony. Used stock exhaust, A9 camshaft, 50cc 100cc carburetor with aftermarket air filter. Now it sounds a lot healthier. I have 64mm valves. No other modifications were required to use the 69mm head/timing chain.

Install was easy, took a few hours and was my first bbk install. I watched YouTube videos for instructions. My 49cc Gy6 used to do 35 mph, now it can do 48 mph easily on flat terrain. Lift off and hills are also light years better. I have a stock muffler, Gofit carburetor, stock air cleaner and roller bearings.

Fits 1 on Long World Sport Case, 2 on Short World Sport Case. Upgrade from 50cc to 100cc, talk speed! 1st long case where I blew a piston on my second test run (my mistake). I marked it with a red line and quickly realized my speed was over 50 to full throttle.