the bumper is about 2 in long and made of a rubber.  should be on the shock shaft opposite the shock body. 


i wasn't talking about the shrader valve.  87-90 250 shocks have a round black knob on the rezzie which is for compression adjustments.  if your rezzie is just round without that, you must have a 85-86 shock. 

87-90 shocks have a round black adjuster that slides in and out on the shock oppositte the shock body.  thats for rebound

what year lt250 do you have?