Towner said:Screw in a bolt (I think it is 5/16") and give it some gentle taps to loose the taper.
concours said:Slide hammer
edward said:Is someone able to confirm that the correct extractor bolt to use for the Boyer Bransden is 5/16 BSF. I made the rather stupid mistake of trying to use the bolt supplied with the Tri-spark until I realised too late that this is metric and I have slightly damaged the threads.