BSA B31 Piston Complete +030
71 mm Diameter = STD
+030 = 71.75 mm
more measurements see last pict.
including gudgeon Pin, piston rings and circlips
Piston Clearance 0.12mm or 45thou
BSA B31 Piston Complete +020
71 mm Diameter = STD
+020 = 71.5 mm
more measurements see last pict.
including gudgeon Pin, piston rings and circlips
Piston Clearance 0.12mm or 45thou
BSA B31 Piston Complete Std.
71 mm Diameter
more measurements see last pict.
including gudgeon Pin, piston rings and circlips
Piston Clearance 0.12mm or 45thou
BSA B31 Piston complete +080
STD = 71 mm
+080 = 73 mm
more meas. see last pict.
including gudgeon Pin, piston rings and circlips
Piston Clearance 0.12mm or 45thou
BSA B31 Piston Complete +040
71 mm Diameter = STD
+040 = 72 mm
more measurements see last pict.
including gudgeon Pin, piston rings and circlips
Piston Clearance 0.12mm or 45thou