Hi Jimmy57,jimmy57 wrote: ↑Wed Jan 02, 2019 12:28 pm They didn't ask me but it seems a better thing to do in the rear bearing saddle area is to take a Dremel or other tool with a burr and grind a groove down the bottom middle. There is a hole in the balance shaft case that goes into the hollow cavity already. If debris blocks the drilled one why have the water go to the mid point of bearing before it can run through the ground reliefs on saddle sides.
Following up on this... Having completed this step, I don't think this clearancing is for drainage. The new hole will drain the space nicely. I think this clearancing is to allow the new bearing to slip in a little easier when you press it in. It was pretty tight, even with this done, and I couldn't get it to test-fit without removing this material.
Plus, the material removed does not actually go all the way through to the end. It's just removed where the bearing sits, and the aluminum that the outer race is flush to will still prevent drainage, so I'm certain it's not for drainage.