8:1 Compression BSA B40 Piston +60 = 80.5mm Pin diameter: 19.00 mm Middle Gudgeon Pin to top of piston: 41.25 mm Length Gudgeon Pin: 66 mm Piston Clearence 0.12mm or 45thouwith Piston Rings, Circlips and Gudgeon Pin
BSA B44 Piston Ring Set / Piston Rings +040
Top rings are 1/16” thick and 1/8” wide
Oil ring 1/8” wide and 1/8” thick
fit also Norton 16H,ES2 and Model 18 Original Piston
Thickness: 1,55mm/3,15mm
+040 =80.00 mm
check thickness of piston rings