So you need a new ball bearing for your Honda this or Ducati that, you say? Actually what you need is the same type of generic bearing your motorcycle’s manufacturer used.
Very few bearings are unique to a motorcycle or manufacturer, although the prices dealers charge can be uniquely rude or even ridicules priced up to 15 times the cost of the OEM value
By cracking the code stamped on the bearing, you can buy from a bearing manufacturer, engineer part store, or online. Just be sure to stick with name brands like SKF, FAG, Kyoto or NKE. If the first of four numbers is 6 it means single row; 5 is double row. Three numbers mean that it’s heavy duty. If the second number is 2 it means ‘light’, 3 is medium.
The next two numbers denote the inner diameter, 00 – 10mm, 01 = 12mm, 02 = 15mm, 03 = 17mm, 04 = 20mm. If they’re 05 or higher, multiplying by five gives the bore. For example, 05 – 25mm.