2003 Ski-Doo ZX Series Factory Shop Manual, Page 259Get this manual
Section 06 ELECTRICAL Subsection 02 (IGNITION TIMING)
Select correction factor no5This will retard the timing by because the difference between correction factor no4 and no5 is(passing from to1)
The display confirms that correction factor has been changed to no5Press any key
TIMING1-8:5 YES
MODIFY? NO
A30E27A A30E2HA
IGNITION CORRECTION FACTOR CORRECTION FACTOR PROGRAMMED IN MPEM IGNITION TIMING CORRECTION 4
If the new correction factor selected above is the good one select NO and press ENTEROtherwise select YES to choose an other correction factor