12V DC Motors - Similar to drills, no gearbox.

So I found these two DC motors hanging around at home. They were taken from a child's ride-on motorbike, and they don't have the gearboxes any more because they were big horrible plastic things, designed specifically for the bike itself. I tested them today and they seem to be working fine, but be aware that they're not in any way new. Should be alright for featherweight drive with a gearbox added on. Here are the pictures, sorry they're terrible quality:
http://i.imgur.com/m1OsBXU.jpg
http://i.imgur.com/Z2TXOx1.jpg

PM me with interest or offers. :)

And no, the ruler's not for sale.

Size 540 motors. But the D shaft is not the most common variant.