BSA B33 Piston +020= 85.5 mm 1946-1953 Hep 11341+20 65-1260Compr. ration 6.8:1slight rusty rings to be used with flywheels 65-1235 and 65-1235 to be used with conrod 66-482 Piston Clearance 0.12mm or 45thou Compression Height: 31mm Piston top - Gudgeon pin top: 22 mm Gudgeon pin diameter: 19 mm for long conrodwith gudgeon pin, circlips and piston rings
1946-1953
Hep 11341+40
+040 = 86 mm
65-1262
Compr. ration 6.8:1
to be used with flywheels
65-1235 und 65-1235
to be used with conrod 66-482
Piston Clearence 0.12mm or 45thou
Gudgeon Pin: 19mm
Compression Height: 31.1mm
for long conrod B33 M33 B34 Gold Star
distance between 2 ends of piston ring must be 0,5 mm