BSA B31, B33, M33 Valve Spring Set (1950-60) OEM: 65-1146, 65-1147

Description

Product Description

BSA B31, B33, M33 Valve Spring Set (1950-60)

Includes 2 inner springs (65-1146) and 2 outer springs (65-1147)

Approximate measurements:

Large Outer Springs: OD: 1 9/16″ (39.4mm),

Length: 2 3/16″ (55.6mm),

Thread Thickness: 5/32″ (4mm)

Small Inner Spring: OD: 1″ (25.4mm),

Length: 1 7/8″ (47.8mm),

Thread Thickness: 3/32″ (2.6mm)

Made in England

OEM: 65-1146, 63-1147