1997 Ski-Doo Factory Shop Manual Volume Three, Page 148Get this manual
Section 05 ELECTRICAL Sub-Section 03 (IG NITIO TIMIN G)
IGNITION TIMING
NIPPONDENSO TRIGGER COIL SYSTEM
Ignition timing is adjusted by movement of trigger coilRaising position of trigger coil retards ignitionLowering position of trigger advances ignition-
CAUTION
E ach ti ig nitio ti in is juste oving trigger coil, air-gap ust be adjustedRefer to CDI MAGNETO 04-04 then look for Trigger Coil djustm ent after adjusting ignition timing2