Are these stock pistins or are they better? I got 4 of these with the kart I bought among other engine parts, and I don't know if they are something I need to keep or not.
http://i1174.photobucket.com/albums/r601/chrisnsonnie/IMG_20120803_174852.jpg...
This number was on the bracket for the brake caliper...#0477.
http://i1174.photobucket.com/albums/r601/chrisnsonnie/IMG_20120801_165007-1.jpg
http://i1174.photobucket.com/albums/r601/chrisnsonnie/IMG_20120801_165033.jpg...