There is some difference in someone who has been riding consistently for the last 30 yrs and someone who has decided to ride again after a 30 yr hiatus. Also, don't forget to factor into the equation how well you think your spouse will fare with you suddenly out of the picture. I'm not normally into telling other people what they should or should not do, but in this case, I would strongly suggest that you not start riding a 800lb bike at age 68. I stopped flying for the same reason, even after a lifetime of flying experience.

chas