Mini bike tapered bore sockets are specialty items available at OMB Warehouse. This product in our inventory is the ideal OEM replacement part for most mini bikes. A taper bore socket is one where a tapered bushing is bolted into the taper bore that is machined in the socket. When installed this bushing is compressed onto the shaft providing a tight grip. Mini bike tapered bore sockets are bushed sockets that have a tapered bushing bolted into a taper bore with hex head set screws instead of bolts. These are manufactured from high carbon steel and precise machining and processes ensure the consistent finish and high quality. Chain rows are parallel and precisely spaced to increase the longevity of the sprocket and chain. Check out the mini bike tapered bore sockets in our stocks.The10 Tooth 219 Chain Sprocket "B" Type - Yamaha, 10 Degree Tapered, the 10 Tooth 35 Chain Sprocket "B" Type - Yamaha, 10 Degree Tapered, and finally the 8 Tooth 35 Chain Sprocket "B" Type - 9 Degree Taper. All these are made of case-hardened steel and hobbed teeth, "B" Type Sprockets have a hub on one side only. Unless otherwise noted, "B" type sprockets have two 5/16-18 set screws.