2003 Ski-Doo ZX Series Factory Shop Manual, Page 101Get this manual
Section 03 TROUBLESHOOTING Subsection 06 (SUSPENSION AND TRACK)
SUSPENSION AND TRACK
SYMPTOM CONDITION TESTINSPECTION SUSPENSION IS TOO LOWNORMAL USE1Check condition of springsaSprings are weakened or brokenReplace springs2Check springs preloadaLow spring preloadIncrease preload to the recommended position3Check springs
The following chart is provided to help diagnose the probable source of troublesIt should be used as guidelineSome causes or corrections may not apply to specific model