With plug thread M12 x 1.25. Turn the piston slowly against the stopper, then loosen the nut with slowly increasing force. JMP piston blocking tool. The engine is blocked via the piston to loosen the nut on the crankshaft.
JMP Piston Locking Tool Spark Plug M14 X 1.25
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Piston Locking Tool Spark Plug M12 X 1.25 Fits Harley FLHTK-ANV 1690 2013
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