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				PIO in a Shell Valley?
			 
			 
			
		
		
		
		Yesterday I was cruising at about 45-50, and got an unexpected side to side swerving on my shell valley, much like PIO (pilot induced oscillation) in an airplane.  It only lasted 4 or 5 cycles, and I did nothing to correct it, and I think I did nothing to cause it.  Checked out the suspension, and found nothing loose.  Found it to be very disconcerting...... If it had been at higher speed or a narrower road, I could have had a real problem. 
Any suggestions? 
BigMike 
		
	
		
		
		
		
		
		
		
		
		
	
		
		
	
	
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