Triumph / BSA Drive Side Crankshaft Roller Bearing - 70-9974 - B25 / C25 / TR25W / B31

  • Sale
  • Regular price $ 79.95
  • 6 available

NOS USA Made Norma Hoffmann BSA & Triumph Unit Single Crankshaft Drive Side Roller Bearing. You will get the one roller bearing as pictured. We know these bearings are hard to find especially when they are new and original


Comes with a riveted two piece steel cage and 10 individual rollers Fits BSA Unit singles (C25, B25 & B44) from 1967-On. BSA B31 & B33 from 1949-1959. BSA B32 & B34 Competition from 1949-1957. Drive Side for M20 & M21 models from 1945-1957. Drive Side & Timing side on BSA B50 models from 1971-1972. Also fits Triumph TR25W Trophy drive side from 1968-On. Please refer to your parts catalog for proper fitment. 

  • Made in the USA by Norma Hoffmann
  • O.E.M Part number is MRJA25, NF305, 24-0724, R325L or 70-9974
  • Free shipping in the USA (lower 48)