Recently I was notified of a "content problem" on this site, which was nothing more than a user who had input a lot of motorcycles into the current motorcycle space.
I cleaned up the respective user's profile, put a limit on the "Ride" field, and added a new field that allows everyone to input the rest of their motorcycles. You can see it here:
http://www.r3owners.net/account/personal-details
I didn't force the change on any existing profiles, but if you attempt to update your profile the 20-character limit will be enforced on what you ride.
The page itself could use some additional TLC, it's a bit out of order. I've also thought about revisiting the enhanced profile (online garage) idea. It wasn't well adopted a few years ago, but maybe the current group would consider it differently.