Rear M/C overhaul-83 R100RS

[Rugged Path]

I had someone knock out the old piston so, not sure of the correct re-assembly.

Got the post 9/80 kit so I can install the new piston (it is the correct one).
What is the best / obvious way to clean out the M/C internal bore of old crud?

In the kit we have;
Piston
Spring
steel washer
rubber ring
brass coated collet / seal.

I see that the brass collet fits over the rubber seal. So, I assume the spring fits over the snout end of the piston and inserted into the M/C.
Then in order of inserton on the external piston hammer end, we have the washer first, then rubber ring and finally brass coated collet / seal.

Would I need a piece of copper tube to go over the piston hammer end to knock in the seal?

Clymers say to soak the piston and its seals in brake fluid before inserting. Is that the best way?
Or, shall I use the grease in the small sachet that was included?

Thanks for answers forthcoming.

 

[toadjam]

eh?

was going to take the pi$$ .but then i remembered , lots of you are better at it than me . so i think i'll sit this one out .

 

[(RIP) pastyman]

I gather that the piston you are talking about is either in the brake master cylinder or slave cylinder. It would help to know what bike/year /model and what system.

 

[Kenny]

Hate giving advice on brakes.

Clean out cylinder with brake cleaner spray. Then lube up the seal/piston etc and it should neatly fit all back in without any force whatsover needed

 

[toadjam]

doh !

sorry . misunderstood this one completely .





i'll get me coat

 

[(RIP) Proff]

I've got a tiny cylinder honer somewhere, just ran that up and down master cylinder bore to clean and check for any deep- scores, then rebuild...trouble is tho' there are 3, iirc different sorts of seals...
this type of honer >>
http://cgi.ebay.co.uk/H315-HORIZON-...t=UK_Hand_Tools_Equipment&hash=item2a092348c0
but 3 leg
like this one but from 1/2" [12mm]
http://cgi.ebay.co.uk/New-Brake-Cyl...t=UK_Hand_Tools_Equipment&hash=item2a0f1f355b

 

[John Roberts]

I had grief with the one on mine, an '82 R100RS, perhaps the following might be of some help:
http://www.ukgser.com/forums/showthread.php?t=230761&page=2
See post 23.

If you are coming to the Wee-kend I could bring the seating tool along.

 

[Rugged Path]

<Snip> from John Roberts,
If you are coming to the Wee-kend I could bring the seating tool along.

Ain't possible as I am over 3,ooo miles away John,

Sometimes I bring bits from the 83 RS bike back with me to work on, and this time it is the rear M/C to which I want to install the new piston. Not back to the UK till mid August so, plenty of time to take the right course of action that spills out on the forum pages.

Thanks for the link.