1. How "smooth" should the surfaces on the various top end parts be on a scooter with 2500 miles? Should they be totally smooth? Like a beer can? Mine are not… They are coarse in some places. The scooter has never been run low on oil or over heated. Do those parts just have a bit of galling as part of normal operating?
2. Oddly, I didn't see anything wrong, specifically, with the old head gasket. There is rust around it for some reason. See pics (sorry about the weird pic orientation). Thoughts? Should the rust be removed before I fit the new gasket? If so, how does one remove rust? How should I clean up these surfaces/parts anyway? Parts cleaner? Brake cleaner?
3. The base gasket has some rust around the exterior of the gasket, too. See pics… I was hoping to leave the base gasket undisturbed, as I'm already in over my head, and piston rings sound scary… With the rust and all, is leaving the base gasket in there a bad idea?