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Polecat

Sorry to hear the news but totally understand how you have "lost the faith" after the scum take without a thought.
(been there) give it time though you may feel the urge to fettle again. Can I suggest a "rat" type scoot (or the X7 if its still in your possession) a toy to fiddle but not loved or desirable to others

well that,s  it got scooter back after a month the scroats couldn't start it ripped the wiring to bits cut a long storey short  cashed in on the insurance lost about £800 -£900 alltogether so it's good bye  lads will still be a member but i've lost the spark i loved that scooter
polecat

Can't argue with either.

btw: I have been told today that parts* have arrived from Piaggio so work can now commence.

*Not sure how many or what bits are in the boxes that have arrived.

Edit: no there isn't. How daft is that.

The cynic in me suggests, because either:
A. amateur DIY mechanics are not allowed to fiddle with brakes
B. the pistons will have rusted solid before the caliper needs new seals

Progress, of sorts. Apparently the calipers have now arrived. Rapid service there, Piaggio.

The workshop manual does not say (unbelievably!) which front caliper is linked to rear caliper when operated. Can anyone who has had to refill/bleed rear brake confirm what the procedure is please?

On mine (350 ABS/ASR) the right front was the linked front. Which also means the left front is done by the right lever, which again seems weird.

Will the corresponding front caliper need to be bled as well?

If air has got in, yes.

I see from the manual that hidden in the depths somewhere is a brake balance valve with a bleed nipple. Will this need bled or only if disturbed.?  Hopefully I don't need to disturb any ABS workings.

No idea. The ABS gubbins is in the fairing just in front of the dash area, so a screen + front fairing upper off job if you want to look at it.

Whoops, last line meant bleed rear and front right calipers, not reservoirs!

It should also be obvious when I start looking and removing reservoir lids which level has dropped. And as you say, feeling each set of front pads when trying levers should confirm which side is which. Just don't want to try levers unneccesarily as I've not touched them yet and don't want to have to find and bleed balance valve as well

Thanks Dave. So from what I can gather from forum

The right hand brake lever operates only the front left caliper/disc

The left hand brake lever operates rear caliper/disc and front right caliper/disc

So as I've only removed rear caliper I will need to refit, refill at left front lever reservoir and bleed rear and right front reservoirs!

You might get away without bleeding the splitter valve as you haven't touched the linked front brake. The rear brake is a straight through feed from the master cylinder.
The way to tell which front brake is the linked is to squeeze the dedicated front lever and with your other hand feel which caliper is moving the pads then you know the other is the linked without squeezing that lever and potentially making bleeding more difficult.
Bleed the rear until there is a little 'feel' in the lever then the front and then the rear again and leave the lever tied 'squeezed' overnight if you aren't entirely happy. It will firm up with use too.