PLEASE NOTE: Delays in processing orders. Orders placed between Tuesday 21 January and Monday 10 February will be processed 11 February.
Gearbox mainshaft gear, 20T x 16T, BSA, M, B SERIES, genuine NOS,to suit BSA M20, M21, B31, B32, B33, B34 etc Original part number 24-4231 - 20/16 Tooth. To suit BSA M20, M21, B31, B32, B33, B34 etc