· FORUM GODFATHER.....R.I.P. PAT
You aren't stressing the engine at all. MPGs drop off because of aerodynamic drag. Out West I'll do an indicated 82/actual 75mph at 6000rpm all day long day after day. The only issue is the bike starts misting oil through the breathers so I carry extra oil with me. The bike will do 8000rpm just as easily but that would be a bit fast.