The only wear was from some Indian crap that was in there. The engine is to new to show real wear.
The idler shaft and left cam bushing have the groove on top. From what I've read here, its for gravity feed, which makes sense. Thats why I asked about this one. What Hotater says makes sense also. What Guy says makes sense too. There is to much sense here.
I, however just found out about something that makes no sense and I want one. A small (3-10kw??) surplus, U.S. Airforce turbine powered generator which (according to my friend/owner of the website I maintain) can be had for under a 1000 US Dollars. My neighbors will be really happy with me then.
Thanks, Geno<at>sprucemtsurplus.com
6/12/06 This is the solution I've reached for the bearing:
http://www.genedevera.com/listeroid/#rcb