The swingarm wears out were the carrier sits , I get that area welded than grind and file back so the carrier slides back and forth nicely than the banjo bolt wont wear in to the swingarm , as my caliper was showing signs of massive wear I bought a new 450 one and hose and fitted it , it a tad lighter and the banjo bolt is on top so it wont dig in the swingarm , this was on a 250 06 2t.