Anybody know what cylinder this is?

Cribbs74 wrote:Dried burnt castor. Throttled Pee Wee cylinder.

Yes it may be so..the ground neck is brownish because of slight rusting but the fins are black. I also have a No2 new oldstock thin wall cylinder that is rather brown than black and not because of rust. See the one at the bottom:

No,this is neither rust or dried castor. The brown finish looks like an anodizing. There are no inconsistent edges that would suggest someones' homebrew, and the coloring is even.

And no wear marks that would suggest throttle ring.

The throttle ring could have been summarily removed by some prior owner without ever having been used (or used very little), thus no scratch marks.

edw wrote:No,this is neither rust or dried castor. The brown finish looks like an anodizing. There are no inconsistent edges that would suggest someones' homebrew, and the coloring is even.  

Well you can't anodise steel for a start-so forget about that as an option. I'd still opt for it having had a rotating exhaust throttle on it at some stage-possibly only at the factory-that was later removed for some reason-the brown could be either castor residue from actual running or simply oxidised oil/grease from initial assembly-if left undisturbed long enough the stuff dries out like this....or it could simply be a case of the cylinder being inadequately blacked during the treatment process-either thru operator error, or because of time, bath depletion etc etc

ChrisM
'ffkiwi'

ffkiwi wrote:

edw wrote:No,this is neither rust or dried castor. The brown finish looks like an anodizing. There are no inconsistent edges that would suggest someones' homebrew, and the coloring is even.  

Well you can't anodise steel for a start-so forget about that as an option. I'd still opt for it having had a rotating exhaust throttle on it at some stage-possibly only at the factory-that was later removed for some reason-the brown could be either castor residue from actual running or simply oxidised oil/grease from initial assembly-if left undisturbed long enough the stuff dries out like this....or it could simply be a case of the cylinder being inadequately blacked during the treatment process-either thru operator error, or because of time, bath depletion etc etc

ChrisM
'ffkiwi'

what Chris said...

Well if it bothers you U can reblue it with little effort and small amount of $$