- - - About drilling the brakes...I have a drill press, I have not yet had the time to get to this, but its definitely something I am meaning to do. Any advice on this? The brakes are THICK, I will surely need to get a load of drill bits as it looks like they will wear quickly. - - -
Hi Tom,
further to fox's reply, the XS650 brake disks are tougher than old boots.
Here's what I did to make the holes using my el-cheapo drill press:-
Buy cobalt steel drill bits, one at the hole size, t'other about half that.
I used normal high speed steel drill bits on the first disk I drilled and had to sharpen them every 5th hole. Then I bought cobalt steel drill bits which did 3 more disks and they're still good.
(I used 3/16" then 3/8". Others drill more holes of a smaller size)
If you drill bigger than ~7/16" you start to lose more surface area on the disk faces than you gain on the hole bores and it's the disk's total surface area that lets it cool.
Mark out your choice of hole pattern. More holes is better but the pads don't care about the pattern.
Indent the hole centers with a sturdy centerpunch and a BFH.
Set the drill press to it's lowest speed and use the hardest pressure you can on the feed handle.
Drill all the half-size holes, then the full size.
Keep the work flooded with cutting fluid as you drill.