Triumph Pre-Unit Twins Front Drive Sprocket 57-0471 Twenty-One Please keep in mind that

Please keep in mind that 250 & 350 models use a 70L chain while 441 & 500 models use a 72L chain

Original types

Works with Keihin PWK carbs both Flange & Spigot types from the 26MM & 30MM

OEM part number is 82-4195

57-1226 & T1226

Triumph Pre-Unit Twins Front Drive Sprocket 57-0471 Twenty-One Please keep in mind thatNew Triumph 650 Pre Unit Twins Front Drive Sprocket. This EMGO sprocket is the same quality as the "English made" types for half of the price. Sprocket accepts a standard 530 or 5 8" X 3 8" chain. Use the drop down menu to select which size sprocket you need. Fits the Triumph 650 Pre Unit twins (Bonneville, T120, 6T, T110, TR6SS, etc) from 1947 1962. Also fits Triumph 500 Pre Unit twins up to approx 1956. Please refer to your parts catalog for proper