Triumph pistons 6T +40 /Pair-Iron Head
70-2891/040.E2891Thunderbird 6T 7:1
Triumph, Pistons Pre Unit
71mm +40=72mm
Gudgeon Pin: 17.4mm
650cc
for Cast Iron Head - please do not fit to alloy head
complete with gudgeon pin, piston rings and circlips
Piston Clearance 0.12mm or 45thou