BSA Piston 85mm B50 Goldstar +40 500cc Unit Construction. BSA DBD Gold Star Pre Unit STD
Diameter of this piston = 85mm
with gudgeon pin, circlips and piston rings
Piston Clearance 0.12mm or 45thou
Compression 10:1
compr. hight: approx. 32.6 mm
Gudgeon Pin Diameter: 19.00mm
Please look at all pictures
Triumph High Level Exhaust pipe Low Level 2 in to 1. 500 cc. Pre Unit Push over stub RHSID at Cylinder head end 1 1/2" 38 mmOD at silencer end 1 1/2" 38 mm Made in England