my spyder 2008   15 000 km  revs normaly when starting, but very soon revs decrease and finaly the engine turns on 1 cylinder and stops running. Just replaced spark plugs, but this didn't solve the problem. When engine revs over 3000 rpm , no failiar is noticed.   The problem occurs between 1500 and 3000 rpm , no smooth acelerations.  Is there anybody who had the same experiences?    Any idea what causes that problem and what is the solution?
				
			 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		