Also thinking out load here...two things came to mind when reading these posts. helpwithhope, that is an excellent, excellent point. And it made me think that they weren't removed for DNA reasons. They were removed to mask the identify of the bike. It has been stated (by LE and others alike) that WB is a known dumping ground for trash. A generic looking black bike washing ashore is much less likely to raise suspicion than a black bike with gold handgrips.
This also makes me think the person we're looking for is someone very familiar with the fact that Mickey changed out her handgrips to the custom gold ones. Let's take for granted that LE is correct in stating they believe the bike was dumped the morning she went missing...no information about her changing out hand grips from stock to custom had been released at that point. (no information had been released at that point). To strip the bike of the handgrips and throw them into the same murky water you threw the bike...why do that, unless you know that the gold handgrips would be an identifying item at a later date?
HouDat, I've got to disagree a little, but not completely here. It very possibly could have been panic driven. But the more I just look at what we know about Mickey, what we do have confirmed from LE, what lack of developments there have been...I am more and more convinced that this is someone who knew her very well. Whether she knew them very well? I'm still not sure. My gut tells me yes, but my heart doesn't want to believe it.