BSA / Triumph Drive Side Crankshaft Oil Seal - Unit Singles Circa 1959-71
Left hand crankshaft to engine sprocket oil seal.
Correct fitment on all B25, B40, B44 and TR25W models from 1961 onwards.
Also used on later C15 models from 1959 onwards.
OD: 2+1/6" (52mm)
ID: 1+9/16" (40mm)
Width: 1/4" (7mm)
OEM: 40-0025, 40-25, 70-8025, E8025
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