I did a tour in Baja with well over 80lbs of gear... with the bike, over 100 lbs total. Didn't even think about it until one stormy night when I decided to hotel it... I couldn't carry the loaded bike up the stairs... (didn't have a gear low enough to ride up the stairs either... )

Had a great time on the tour though... some 1000 miles in about 15 days or so. Some of that gear was food and water mind you. I don't just pack heavy.