BSA Pre-Unit Singles "Big End" Assembly (1) - B31 / B33 / M20 / M21 / Etc (PRE - 1959) Reprint Please review measurements for proper

Please review measurements for proper fitment

New Triumph / BSA clutch and brake lever perches

Threads have a Diameter of 1 3/16"

New Top Quality BSA Unit Twins & Singles Speedometer Or Tachometer Mounting Rubber Cup

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BSA Pre-Unit Singles "Big End" Assembly (1) - B31 / B33 / M20 / M21 / Etc (PRE - 1959) Reprint Please review measurements for properWorn big end? Bottom end making a "knocking sound"? Chances are your big end is in need of replacement! Replace your big end with our new high quality English made complete big end assembly's. Comes included with pin, rollers, race, nuts, etc. threads are 3 4" OD Works with connecting rod part #'s: 66 483, 65 1614, 66 481. Fits all BSA pre unit singles (B31, B32, B33, M20, M21, M22, etc) from approx 1937 1958. Check your parts book to ensure the best