Harley Davidson Panhead: “Tune Up Checklist”

Several weeks ago I had my 1959 Harley Davidson (with sidecar) out for a pretty long ride.  Round trip, I probably logged about 75 miles.  Unfortunately, the last 25 miles or so were not very fun.  The bike started to miss around the 25 mile mark, but just slightly.  My initial thought was that something was just [...]