Guys -
Tonight I got started on slapping a 750 motor together and while I was wiping down the lower half of the crankcase I noticed the center section felt rough, not smooth like the outer sections. You should be able to see this in the pictures below. It looks like stress cracks to me. Is this something to be concerned about? Your thoughts, please.


Click image for larger version. 

Name:	IMG_20130823_211058[1].jpg 
Views:	34 
Size:	105.1 KB 
ID:	311210Click image for larger version. 

Name:	IMG_20130823_211110[1].jpg 
Views:	39 
Size:	113.1 KB 
ID:	311211