5 Speed layshaft needle roller bearing, drive side for; 

BSA Rocket 3 750cc 

Triumph 3TA,T21,T90 (1968-), 500cc/650cc pre Unit twins slick shift box, 5TA,T100,TR5 500cc Unit twins (1968-), T120,TR6,6T 650cc Unit twins, T140/TR7 750cc Unit twins, T150/T160 750cc Trident models.  
  
OEM:  57-1606