2005 Ski-Doo Racing Handbook, Page 397Get this manual
SECTION 082005 MX 550 AND 380 FC
NOTE: When checking timing, certain procedures require that the magneto flywheel be turned in clockwise direction, viewed facing the magnetogeneratorIf it is necessary to turn back (counterclockwise) for any reason, rotate the magneto flywheel at least one-quarter turn counterclockwise, and then rotate it clockwiseThe last magneto flywheel movement when making critical check must always be in clockwise direction, to ensure that the slack in engine moving parts is taken-up Rotate the magneto flywheel counterclockwise, one-quarter turn then carefully rotate it clockwise until the needle indicates the specified measurementRefer to TECHNICAL DATA Verify that the magneto flywheel mark perfectly aligns with the mark on the trigger coil, refer to illustration If the marks do not align, check magneto flywheel and trigger coil part numbers and check Woodruff key conditionIf all parts are the appropriate ones and if Woodruff key is in good condition, continue the procedure2 1