Couple of LC4 questions

[Umarth]

Got a few questions on the LC4 that I'm hoping some kind souls on here will be able to clarify for me.

1. Replacing the cam bearings, I inspected the cam shaft and noticed this:

That pin seems pretty rought arround the edges and I'm wondering if this is normal wear? Heavy wear? About done?

2. Taking off the radiators, I noticed that the two lower "tabs" that bolt the radiator to the frame have snapped off at the weld. Since this part of the frame holds oil I'm wondering if there are any special conciderations to weld them back on?

3. Is this normal and expected amount of gunk on a cylinder? If not, what would it be symptomatic of?


4. The spark plug's color, is it what it should be?


thanks guies...