2001 Ski-Doo Mini Z Factory Shop Manual, Page 41Get this manual
Section 03 TROUBLESHOOTING Subsection 02 (ENGINE)
8Check exhaust systemaRestrictionReplace9Check ignition systemaDecrease in power due to incorrect ignitionCheck spark plug and ignition coil operation10Check engine compressionaWorn piston(s) and ring(s)Replace (refer to TECHNICAL DATA 10 for specification)SYMPTOM CONDITION TestInspection ENGINE DETONATION AT MAXIMUM RPMNORMAL USE1Check which type of fuel is usedaOctane number is too low andor alcohol level is too highUse recommended fuel type2Check spark plug typeaImproper spark plug heat rangeInstall recommended spark plug(s) (refer to TECHNICAL DATA 10)3Check exhaust systemaToo much restrictionReplace4Check ignition systemaIncorrect ignitionCheck spark plug and ignition coil operation5Check carburetionaFouled andor improper carburetor componentsClean or replace according to specification (refer to TECHNICAL DATA 10)