This tool fits into the threaded hole in the crank case. The centre plunger of the tool drops down and locates in the machined slot on the crank, when the crank shaft is in the top dead centre position.
Triumph part: 60-1589, 61-7072.
As used on Triumph twin motorcycle engines with UNC threads from 1969 onwards. See my other listing for the tool up to 1969 which uses BSF thread forms, Triumph part 61-7071 or D571.
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