World Superbike Racer
Join Date: Apr 2015
I Ride: 2015 30th anniversary ZX-6R
As has been pointed out, the over filled reservoir is the most likely culprit. It's worse as it were with braided lines because they have a much more limited expansion than O.E. rubber lines.
There are two more things your are most likely guilty of: 1) You need to really clean the calipers, pull the pads completely out. Give the pins the once over with either steel wool or 0000 wet/dry sand paper. Pull the pucks out and give them the same once over. After the pockets are cleaned up lube the pockets that the pucks reside in. Do not over do, you absolutely want no grease on your rotor/pads. Be tidy in all bike related procedures.
2) Your made the other neophyte mistake: You did not clean your rotors - I'm not talking as quick wipe off with a spot of water & soap. You need to get yourself a hone that you insert into a drill and scour the compressed crap the previous pads left on the rotor. Your rotors need to be completely removed from the wheel in order to do this properly. Do not feel bad for not doing this. Most rookies ignore this step (note: wipe down the rotors w/isopropyl or acetone; or brake cleaner but wear rubber glove if you go this route.)