How to Select the Correct Comet Belt?
2.Measure the "Outer Diameter" (O.D.) of the driven pulley on the jackshaft.
3.Measure the "Center Distance" (C.D.); which is the exact distance between the center of the engine crankshaft and the center of the jackshaft. Must be precise.
4.Use the two measurements; the driven pulley outer diameter and center distance measurement to determine the correct belt part number from the relevant chart below.