BSA 47 tooth rear SPROCKET A50 A65 47T 68-6088 1966-70 Lightning Thunderbolt
You will get the brand new 47T sprocket pictured for your 500 / 650 BSA. Part number 68-6088. This is flat on one side and grooved on one side like the picture. The ID is 7 5/16"
 
    
     
      
    
    
    
   
 
      
      
      
     
         
       
       
      