Crank Hole Finish Size For Pilot Bushing

The ONLY way to drill the crank for a std pilot bushing is to put it in a lathe, INDICATE it in, and finish the hole.

You could use the already undersized OD bearing, BUT the hole in the crank is rough finished , and may not be in the center.

By the time you diddle around with turing down the OD of the bushing you have, step up to the lathe and MAKE your own bushing. Make it to the roller bearing size, and pop it in. Have done it 30 or more times.

I despise roller bearings where a pilot bushing SHOULD be. I have had to repair (at the minimum) 15 input shafts that are wrecked from roller bearings.

In fact, I am making a bushing for myself this week, for my own engine. It takes 20 minutes and you don't have to use a roller bearing.

In my life, I have not found a great many roller bearings in the places they are used the most, such as rocker arms, input shafts and motorcycle pivot points, just to name 3.