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JAP Twin SV Piston Brough Superior/Zenith/Coventry Eagle STD.
1000cc K Type 1923-29= 85.7 x85
1150cc LT, LTZ,L Type = 85.7 x95
500cc= Model K
85.7mm x 85
550cc = Model L
85.7mm x 95
600cc= Model U
85.7mm x 104
Gudgeon Pin: 13/16" - 20.7mm
Compression Height: 1 5/8" - 41.3mm
Piston Length: 3 1/4" - 82.5mm