yOUR SENSOR IS BEHIND THE TIMING COVER  BETWEEN THE CAM PULLEYS 
1 REMOVE COVER THAT GOES OVER THE SPARKPLUG LEADS ON TOP OF THE ENGINE 2 SCREWS 
 LOOK DOWN ON THE ROCKER COVER AND THE WIRING IS ON THE LEFT HAND SIDE 
2 REMOVE TOP TIMING COVER  (ITS EASYER TO REMOVE THE AIR FILTER HOUSING )
3 THE SENSOR IS BETWEEN THE 2 CAM PULLEYS HELD IN PLACE WITH ONETORX SCREW
NO NEED TO REMOVE TIMING BELT OR PULLEYS 
THE SENSOR PULLS OUT FROM THE TOP INSTALL NEW ONE THE SAME WAY...
                
 TONY...
                
 January 2005