you need to swap the positions of the fixing bolt and the adjuster normally the adjuster is on the top part of the caliper and the fixing bolt is on the bottom you need to swap them over, you might not want to do this on your nos black dc mx1000s though or theyll be worth fook all (though we all did it BITD) you can get other calipers that are shipped that way dia compe fs 8.... something or other up to you , if its for a rider use an ACS BOA caliper on the front cheap and easy to flip and works like fook downside uglier than jane goodie on a bad hair day and they are approaching mid school , i love them on the front they work great even on tuffs