Triumph / BSA Unit Singles Gear Box Sprockets - C15 / B40 / B44 / B50 - Choose Size

  • Sale
  • $ 29.95
  • Regular price $ 34.32
  • 1 available

New Triumph and BSA unit singles gear box sprocket. Our EMGO counter-shaft drive sprockets are the same quality as the "English made" types for half of the price. Sprocket accepts a standard 428 or 520 chain depending on year and model.


Fits the all Triumph and BSA unit singles (excluding the Cub models) from the C15, C25, B25, B40, B44, B50 and other models from 1958-1973. Please refer to your parts catalog for proper fitment. 

Use the drop down menu to select which size sprocket you desire.


  • Made by EMGO
  • O.E.M Part number is 57-4306, T4306, 57-2701, 57-2765, T2701 and T2765
  • Free shipping in the USA