Im not a major race builder or machinist , but heres my experience :


My Source bottom end was bought in 04/05.

My crank flange looks great

The shop that checked the crank said it was well within acceptable specs

I did not have to shave any bearings

They had to lightly hone/ fit for the pins (this is posted in advance-right on the site and instructions) .

Ive never had a problem after 3 or 4 years running it to 6200-6400 rpm.

Its apart now and i dont see any major issues.


Oh.... and one of my journals is drilled at an angle.


Im with moderncylinder on this one ...