Quote:

.......The rear seal surface is smooth, not knurled. How critical is that?

So how do you check the indexing of a crank?



Smooth surface is better than knurled for regular seals.......some after market cranks put knurls in the crank, but I can't figure out why. .......The knurl is there if you're going to use a rope seal, and who does that??? (that shows a company that copies something and doesn't even know why it's there) My Source crank was knurled there, so I had it ground off while being indexed......

Yes, indexing is important....and can only be checked in a crank grinder.....