Norton OHV valve lifter / decompressor arm. Norton singles 1939 to 1963. Spindle bore: 1/2" (12.6mm); Offset: 1/2" (12.6mm) - measured from centre of bolt hole to centre of cable hole; Length: 1 3/4" (45mm) - measured from centre of shaft hole to centre of cable hole.Very similar to A2/377 clutch operating arm but less offset and the cable slot for this arm is in line with the centre of the arm while A2/377 has the cable slot at 90 degrees to the spindle bore. Original part number 8869; A2/67; 18175; - exhaust valve lifter
