Review on 🛵 Glixal 139QMB/139QMA Scooter Big Bore Cylinder Kit Rebuild Kit GY6 100cc 50mm Moped ATV Go-Kart - ATMT1-011 by Daniel Hicks

Very cheap and gives a big (for 50cc) performance boost, my scooter has a looser pipe, 9mm cam and 19mm adjustable Keihin carb but I think that would be it of course. there was a big improvement. When you think of machining to make something as precise as a cylinder and piston, it's really amazing that you can get off-the-shelf parts that cheap, let alone big bore kits. The liner in this cylinder appears to be much thinner than the stock one, but only time will tell if this will cause any problems. I assume warping is only an issue if you screw in the cooling shrouds when reassembling, but again only time will tell. and even if it fails in the future, you won't have the $28 it cost for another set. A big win worth every penny and then some.