Alpha Bearings BSA C15 Big end bearing assy Alpha part no. B21
Condition: N.O.S. Original Part No. 40-0720 crankpin 40-0572 roller cage 41-0183 bush 10326-0650 rollers (24)
Fits: 250 OHV unit singles 1958-1961 C15-C15S-C15T-SS80 until engine no. C15S2002
Made in England by Alpha Bearings