There's quite a few recovery packages out there but they cost money. Here's a free one: http://www.cgsecurity.org/wiki/PhotoRec

I haven't used it myself but as its read only, it shouldn't damage any of the pics of your bikes unless you try to save it back to the card. Worst case and if you have the $ a data recover place may be able to get them off. But that typically costs big bucks.