Go Kart Minibike Complete Jackshaft Kit 5/8" X 14" For 40/41/420 Chain This is very popular for use on Go Karts and Mini Bikes. This kits with UCFL203 Pillow Block Bearings Package Include: 1 * 5/8" by 14" Jackshaft + 2 * UCFL203 Pillow Block Bearings + 2 * 5/8” Bore Shaft Collars + 1 * 14 Tooth 5/8" ID Sprocket + 1 * 8 Tooth 5/8" ID Sprocket with built in Key + 1 * 3/16" Keyway + 4 * screws Note: We provide clear pictures, measurements where possible. Please check as much as possible to make sure the item is the one that you need.