Could I please ask the experienced tuners for advice on which abrasive to use for sizing seals in springers?
New seals are almost invariably a very tight fit in the cylinder, and I know from experience how much this reduces energy, so I do like to get them to a better fit. I am reluctant to use wet and dry, as I worry about grit particles becoming embedded in the seal and working on the cylinder, diamond plates just do not seem to remove anything, and I worry again that maintaining pressure to try and get more action raises the temperature too much. Files seem a bit drastic, and might leave a poor finish, so what should I use please?