Just run up the engine on the centre stand, stick her in top gear with the revs on, then rub a block of lard on the rear sprocket coating it liberally.
When the lard gets hot, it melts and lubricates, and when you stop it hardens again!
It's a revelation in chain lubing!
Oh god, I hope no-one tries this........

:o:o:o:o:D:D:D:D???