Feked Classic Bike Parts
The Old Racing Stables, Nine Yews, Cranborne, Dorset BH21 5PW, UK
BSA Valve Spring Set - B31, B33, M33 - 1950-60
Includes 2 inner springs - 65-1146 and 2 outer springs - 65-1147
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)
OEM: 65-1146, 65-1147, Terry No.VS 345
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