PIAGGIO MP3 400 i.e., Service Manual, Page: 169 / 394

- Replace the inspection cap on the flywheel side.
- Connect the diagnostic tester.
- Start the engine.
- Select the menu on the "parameter" function.
- Select the stroboscopic light command in the tra-
ditional four-stroke engine position (1 spark 2
revs).
- Check that the real values of rpm and ignition
advance match those measured using the diag-
nostic tester.
Specific tooling
020460Y Scooter diagnosis and tester
If the values do not match, check:
- distribution timing
- revolution-timing sensor
- Injection control unit
Refitting the rocker-arms cover
- Check that the gasket is in good working order.
- Tighten the two screws indicated in the figure with
" 1 " and " 2 " to limit the reciprocal sliding of the cover
surface with the head surface.
- Tighten the remaining 4 screws in a crossed se-
quence ( 3 , 4 , 5 , 6 ).
N.B.
CHECK THE PROPER POSITION OF THE GAS-
KET.
Locking torques (N*m)
Tappet cover fixing screws: 7 - 9
MP3 400 i.e.
Engine
ENG - 77