spent a couple of hours this week preparing frame, swingarm and wheels for powdercoating, i know from bitter experience it's worth taking a little time to blank off any threaded holes or bearing surfaces, cut out a wood blank with a 18 tpi hacksaw blade to approximate size and hit it on the bench grinder to get it a near fit, finish your blank with a hand file and emery, drill a 6mm clearance hole and pinch together with a length of 6mm rod and a couple of old nuts, it's worth taking a bit of effort in the long run especially when you start rebuilding, the sprocket tappings iv'e just cut down some old 10mm set screws to blank off the threads, same as the 8mm disc mountings on the opposite side of the wheel.
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