Clay pressed into the valve pockets can used to test how far the valves come down toward the piston (when installed).
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Trace: • REF: General-MSR 40 • 1979 Sportster • W E L C O M E ! • REF: Tools - 104 • MiscRes: Parts Resources • REF: Tools & Fasteners • REF: Transmission & Final Drive • REF: Electrical System • REF: General-MSR 04 • REF: Engine Mechanicals - Sub-02B