Liquid cooled motors, discharging some fluid after a refill. Normal?

[evo550]

You mentioned it originally had a corroded waterpump casing, What is the condition of your radiator cores? the magnesium will clog these in a heart beat and then set hard like calcium rendering your rads, and to a certain extent your waterjackets, useless until flushed (or replaced).
Worth a look.

Disregard this, just read an earlier post

[Kenneth S (222)]

Thanks Evo I think you were spot on, that was part of the problem. Simo, I have considered it, believe me. I'ts a bloody nice bike to ride when it goes though. I was lucky enough to score today a complete top end which I am told by the seller is still on the standard bore. There was no coolant in the gear box oil so hopefully the new barrel and head will do the trick.

[Kenneth S (222)]

I received the replacement barrel I bought from a guy on Mark's Swapmeet. I sent it to Greg Ball to get it measured & checked over before I put it on the bike. Ben noticed it has been re-sleeved. The strange thing is that the original sleeve has not been completely removed so the barrel has a sleeve within a sleeve so to speak. I've never seen this but my experience with these old bikes is minimal. Ben said it could be because the original sleeve/casting had some locating keys so it could have been impossible to completely remove the original sleeve.

Has anyone experienced something like this?

[head]

All sleeves are done that way.

[maico police]

All sleeves are done that way.

Monties aren't. 

[head]

Ok, most resleeves are done that way

[Montynut]

Montesa bikes have a replacable sleeve as standard (up to 1983 when a few started with coated cylinders instead of sleeves) which allows a new sleeve to be shrunk in once you reach the last oversize. Sleeves are available for most models

[Lozza]

Ben said it could be because the original sleeve/casting had some locating keys so it could have been impossible to completely remove the original sleeve.

Has anyone experienced something like this?

Nonsense.Someone has just been slack, lots of 'cast in' sleeves (ie the aluminium cylinder is cast around the iron liner) have 2 or more internal ribs. You have to find where the ribs are and machine the cylinder out down to the lowest rib, then machine the new liner to match.
The sleeve inside a sleeve will be a excellent barrier to removing heat from the cylinder walls