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

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 valves or you will have to use a standard 69mm head like I did. ALSO the stock head with new valves made it run great for about 15 minutes before stopping. The only thing I could see was that the new head had defective valve holes causing it to fail and have no compression so I had to use a stock head.