"Biker"
  Well i think the word biker came about late 70's 
 As i rember before that  there were!! 
 MODS and Skin heads These were the scooter boys of the Day! 
 Greaser's!  These were your lewis leather jacket boys TT200 invader/super 6 boys Etc etc 
 Hells angels ! these were your leather jacket covered with Denim sleveless jackets goaty beard etc etc  
 and then i think  
 "BIKERS" were a derivertive of all those who came together after the 60's 70s
 
   for me  i remember the days when we had the left arm up to aknowledge another biker traveling the other way!! 
 a bit like the low V's you see on the continent... 
 not so much seen here anymore 
 
  sign of the times me thinks
