It wouldn't be a bad idea with a used bike that you like a lot to stick oil pressure and temp gauges on for at least a little while until you sort this out. I almost seized my 79 in 2008 and had I been able to see the temp I could have babied it home or shut it off. I made it home just the same but it could have gotten ugly. A couple gauges on a bike isn't a bad idea and could save a lot of money as a just in case add on. If I could afford it every one of my bikes would have those gauges.
"66CL160, 68CL125A, 68CL450, 69CL125A, 69CB750, 71CB450, 71CB500, 71CB750, 72CB350F, 72CB750, 74CB750, 75CL360, 75CB550, 75CB750, 76CB750, 79CB750, 79CBX, 79CBX, 80CBX, 82CB750, 84VF700S 05HDSPORTSTER1200ROADSTER"