Headrace Bearing Set BSA B44 top+bottom
OD of caps: 2 1/8" - 54 mm
Depth: (just under 1/2")12,3 mm
Bottom Cone ID: 1 1/16" - 27 mm
Top Cone including cover plate ID: 1" - 25,4 mm
BSA DBD Gold Star Piuston Pre Unit 500cc Piston +020. BSA Unit Gold Star 500
85.5 mm
9.5:1
Piston Clearance 0.12mm or 45thou
with Piston Rings, Gudgeon Pin and Circlips