Originally Posted by John_Kunkel
Originally Posted by migsBIG
The second crank has this weird type of machined riddling on the front, something I’ve never seen before


It's called knurling, used to expand/restore the diameter of a shaft that's been worn undersized or otherwise damaged.



Thanks John. I was trying to call it rifling, but auto correct don't love me. laugh2

One mystery solved, now just have to figure out now why the multi stamped on the block.