Right, here's the situation:
I just got my bionic mod all sorted with 06 hope mini levers on 07 mono trial calipers, brand new pads on the rear and old uns on the front. Performance was pretty good, rear wouldn't hold on everything and after a while the front squealed a bit, especially when really wet but when used for a bit would settle down. After a while the front brake got incredibly good and the rear improved slightly.
The front brake got contaminated with dot fluid, but i noticed this instantly and cleaned with IPA. performance was restored within half an hour or so after.
Then, i bought a new frame and as a matter of course stripped down both brakes ( as i had to change the rear caliper shell ) all 4 pistons were polished and lubed then really carefully bled.
The rotors were scrubbed with a green scouring pad and fairy liquid then rinsed off thoroughly, then they were cleaned off with isopropyl alchohol and sanded the rotors with 1200 grit to scrub off some brown marks that i suspected was ingrained oil but i couldn't get rid of. The rotors were then cleaned again with IPA
Pads were cleaned very thoroughly with IPA, and the fronts were torched over a gas flame as i was worried about contamination. Pads were then sanded with 320 grit.
After fitting the brakes were very good, especially the rear after 15mins of bedding in. After about 2 hours the rear started squealing and not holding/biting. I assumed this was contamination/bedding in so i poured water on....got a bit better so i cleaned with ipa and used loads of water. Performance was restored. Front was amazing, 7ft to front held like a rock.
Now the front brake is squealing...i dont really understand why this keeps happening?! im taking every precaution and they keep getting ballsed up. Is this part of bedding in? They had about 5 hours of riding since rebuilding.
Sorry about the epic read,id love some help sorting this as its a pain in the ass.
Il chuck a video up to show the situation.
Cheers, Alex