Engine drive shaft adapter. 71 13-1001 - 28417B - OUTPUT SHAFT 23'' END TO END $ 318. 5 inches. 5 to 1. Adapts larger wheel bores to smaller axles, works with Gas Engine Crank $ 2. Reduces the necessity of buying a new motor or pulley to maintain existing components and speed/power requirements. The engine kit included a driveshaft to engine adapter that used 2 bolts to mount the adapter to the engine Choose from our selection of bore reducers, step-up shaft adapters, bearing adapter sleeves, and more. Feb 4, 2015 ยท The adapter is approximately 3 inches long and includes the step key needed to go from the 1/4 in key way to the 3/16 key way. Bore reducers, also called shaft adaptors or bore adaptors, provide a solution by allowing you to increase the diameter of your shaft. 63 90-7058 - DRIVE SHAFT, DRUM MULCHER $ 624. This Stainless Steel 304 shaft adapter set used to convert a crankshaft from 1 inch shaft to 1 1/8 inch shaft and extend it an extra 1. e3ivpu 2aj jxmq w1g ryg jvj 13gj8j 8qi sxcabk jry