The automotive world is very different than what is used on the Norton. The Norton 750 cylinders are held to the crankcase with the flange, sleeving the cylinder removes the very metal holding the flange to the rest of the cylinder. I guess with through bolts, sleeving could be considered, but as WEAL norton mentionned the flange could break off and destroy the engine if the stock fasteners are used.

Jean

Triuph SLEEVEs are not uncommon , though lipped at top to locate vertically .
Some cowboys use Bonneville Sleeves & Pistons in Tridents .
The Alloy T100 & Dunstall 810 use them for some reason .

Useing a THIN paper gasket & considerate tightening ( EVENLY & PROGRESSIVELY ) should see it right .
Dont use a 5 yard thick cardboad gasket though.

Running Loose , as stated , can lead to later poroblems . perhaps .

Triumph Twins Blew the Barrels if Drag Raced on fuel , AT .060 over . But blew the
contraption apart ABOVE the flange . Suppose thats where your refering to it being a trifle thin .

Out with the Ruler . .

This repaired cylinder is pretty likely to either fail in use (bottom spigot broken off), or after a while will result in quite a lot of noise, as the unsupported part of the liner will heat up a lot quicker than the rest, and the resulting expansion may well be enough to nip the skirt of the piston.

Maybe a good idea to advertise the whole lot on Ebay, and look for a good used cylinder that can be relied on for trouble free service in future?

Carbonfibre wrote:, as the unsupported part of the liner will heat up a lot quicker than the rest, and the resulting expansion may well be enough to nip the skirt of the piston.

The laws of physics say that cylinder sleeves never expand inwards, so this comment is nonsense. And why sleeving is a common automotive practice. The bottom of the sleeve/spiggot gets almost no loading and almost no heat, so its not as though they are mission critical or anything.

Triumph used very thin sleeves extending to the spiggot in their alloy cylinders even from the early 50s, and providing they weren't mishandled are still around today.

Cheers.