Begging for the motorcycle isn't going to make them implement it. It wasn't voted down in a player poll, it wasn't some player contest entry that didn't make the cut. It was made by the developers, weighed by the developers and ultimately rejected by the developers... long before anyone even knew it existed. The only reason it's appearing now is because someone asked about a motorcycle mount in a Live Letter Q&A. They probably made it to go with the Strife set, given it's the Advent Children motorcycle Cloud used. We can ask for it all we want but the reasons it was originally rejected would still be the same. It'd be no faster than a fat chocobo.