Last tank 58mpg.
I do have a new problem: roughly 40% power loss on hills. Off/On like a switch. I'll probably just start replacing ignition parts since they're so cheap. Checking grounds, connections, etc.
Also ordering new jets just so I can be sure they're stock. The ones I have don't have any markings, although they look like they're original.
1986 CH150D - 1982 GS1100E - 1977 IT400 - 2004 TTR150 - 2004 CRF250X - 2005 WR250f