F3B ENGINE 207 T RAKKER E URO 4/5 Print 603.93.641 Base q November 2006 Figure 155 Front Rear 71723 o insert the bushing (6), proceed as follows: - Unscrew the grip (I) and the extension (N). - Position the extension (N) and the guide bushing E as shown in the figure. - Repeat steps 1, 2, 3. Figure 156 Front Rear 71724 o insert bushing (7), proceed as follows: - Unscrew the grip (I) and the extension (N). - Refit theguide (G) from the inside as shown in thefigure. - Position the bushing on the drift (A) and bring it close up to the seat, making the bushing hole match the lubrication hole in the head. Drive it home.
The 7th bushing is driven in when thereference mark (C) is flush with the bushing seat. 540665 Valve springs Figure 157 (Demonstration) 70000 Before assembly, the flexibility of the valve springs has to be checked with a suitable tool. Compare the load and elastic deformation data with those of the new springs given in the follo wing figure. Figure 158 Free spring Valve closed 775 39 N 1366 68 N Valve open 108842 MAIN DATA TO CHECK THE SPRING FOR INTAKE AND EXHAUST VALVES