QMB139 47mm Big Bore Cylinder Kit Non-EGR with64mm Valve

Good piston rings, great bore. The casting is a little cheap but it's been running great for 500 miles now so no complaints. I was skeptical about the actual piston at first due to the sunken head, I usually prefer a piston with a dome type head so I don't get over compression, but man that sucker has some power nonetheless. Had to install an oil can with this because of the compression issue, but that's just to be expected with any big bore kit. Shipped fast, package was in good condition, and parts were of adequate quality especially for the low price. Highly recommended. This was a replacement for a Glixal bbk that didn't even last me a week. Nice!

Works great, installed in a weekend, and WAY more power. Best part is it still looks stock from the outside!

👍

Went together very easily and really gave new life to my Tao Tao 50

Great kit for the price. A must upgrade for any stock 49cc scooter

It would have been ok if the head had the correct valves installed. The fact that it didn't means I had to buy another head from somewhere else.