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BSA 499cc Singles M34, M35, B33, B34, 1937 M21
+20 Thou
85.5 x 5/32 " oil ring
85.5/+ 20
Standard bore is 85mm
One oil ring
Fits 499cc BSA singles M34 M35 B33 B34 1937 M21
New old stock
BSA 499cc Singles M34, M35, B33 B34 1937 & M21 + 20 Thou Oversize NOS
£8.00
+20 Thou
85.5 x 5/32 " oil ring
85.5/+ 20
Standard bore is 85mm
One oil ring
Fits 499cc BSA singles M34 M35 B33 B34 1937 M21
New old stock