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Gaskets play an important role in an engine
M Part number is 66-0492 or SE 13
*****Always check your parts book before purchasing to ensure that this part is correct for your application
M Part number is 57-0946
Triumph / BSA Drive Side Crankshaft Roller Bearing - 70-9974 - B25 / C25 / TR25W / B31 Gaskets play an important roleNewley manufactured for 2026, Hepolite is now offering these beautifully made crankshaft roller bearings for many BSA unit and pre unit singles. Features a steel cage with 9 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
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