Keep the memories forever and let the bike go, that's what I would do. But, to be honest I'm not the most sentimental person when it comes to things & objects after watching one of my brothers lose everything in a home fire some years back.
It was a custom built log home, that he spent 7 years building, a magnificent place, even featured in a log home magazine once. It was a complete and total loss, including everything inside, literally a pile of ash. Well, almost everything. It still gives me chills - one photo album survived, with photo's of the house being built. All of us pitched in during the construction years, but Dad spent a lot of time there. Seeing slightly charred photos of Dad helping place the last log was a real tear jerker for all of us, he had passed away almost exactly 1 year prior to the fire. If I recall correctly it was exactly 1 year + one week. Don't quite know what to make of those sorta occurrences in life, but to me the lesson was our things can be gone in an instant, but our memories of good times with the people in our lives are really our most valuable possessions.
Put it on craigslist, tell your story and you will very likely find someone who's excited to get the bike, restore it and make their own memories with it. I'm willing to bet at the end of the day, you'll feel a great sense of happiness sending it off to its new home and new family.