Hi Peter, I really didn't want to use the rattle gun on something so small, if they hadn't given up with penetrating fluid the next resort was going to be a mixture of ATF and acetone and then some heat but at the end of the day it wasn't necessary.
One of the rear callipers is ready for reassembly tomorrow, I read the Haynes manual and it said don't attempt the disassembly of the return mechanism inside the piston but given that the new piston in the rebuild kit didn't have the internals there was no choice. In the end it all disassembled easily and, more importantly, went back inside the new piston very easily. I polished up the inside of the housing with Autoglym Metal Polish and there is one small mark in it half way down. I don't think it will cause any issues down the line though so it will all go back together tomorrow. Hopefully it's twin will be as good.
I've never dismantled a front calliper but the Haynes manual doesn't say don't do it so I'll have a go over the weekend. Unfortunately I don't have access to a compressor to shift them but I've got enough old hydraulic lines to jury rig something to shift both pistons. Geoff wants to see the disassmbled components, he's never seen anything like it and wants to get his head around how it works!
Amazingly none of the roll pins are damaged either so the standard Beta lines will locate properly. The only slight concern I've got is that all the locking pins are impacted into the bodies, I'm hoping I can lever them out to get them working again. If that fails I'll be employing a stainless long grub screw and tapping the calliper carrier.
Guy
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