I would be more afraid of a low mileage belts that haven't moved in 25 years breaking than high mileage belts used daily.I have a 75, been standing in a barn 25 years. I took the belt covers off and it has like new belts. Honda OEM, look like they were put on yesterday. they are nice and soft, not a mark in sight. I know they seldom show marking, but dang these are beautiful. do you really think I need to change them?
You can replace them now or roll the dice and perhaps have one break and grenade the engine the first time you start it. It's up to you.