Yamaha blaster Top end kit 66mm, roughly 10 hours of use. Comes with oem custom 20cc trail head, non oem trail ported cylinder with 188 exhaust duration , right side of intake has some jb weld to cover hole, wiseco piston with rings, wrist pin and clips, 2 used head gaskets one oem size and one double the thickness, and a real vforce reed for blaster, plastic slightly melted but still worked great when ran.Everything should be shown in the pictures, you’ll gain possibly +5 hp depending on pipe and carburetor you run. If you have any questions please message before buying, returns not excepted