I think letting it go is a good way to handle it. Reality is that you have no "say" over it right now anyway, so turning it into an issue is a lose-lose thing.
As for my H, I really don't care about the bikes. He had a motorcycle when we got together after college and I rode on it with him (and burned the hell out of my calf on the muffler one time!). He sold it when we moved south and hadn't had one since.
I wouldn't have balked at him getting another one while we were married. He never expressed that he wanted to. I always though I was a cool wife--I'd encourage him to go golfing with his friends and that sort of stuff. I wasn't one of those women that made a fuss, even passive aggressively, if he wanted to do his own things. Though I'm sure during the revisionist history period, he would have insisted that I would have forbidden him from getting a motorcycle and I'd bet that was even going through his head as he bought the first one post separation as a way to justify his leaving. I'd bet money on it, in fact!
Me38,H:38,S:7 Married:6/99 Bomb:7/04 Sep.:5/05 D Filed:3/08;Final 1/10 Piecing:11/09 H moved back:09/10 Current thread: http://tiny.cc/htcty