2004 Skidoo ZX Series Service Manual, Page 269Get this manual
Section 05 ENGINES (4-TEC) Subsection 06 (CYLINDER AND CYLINDER HEAD)
CAMSHAFT BORESMALL END MEASURED IN DIAMETER MINIMUM (NEW) MAXIMUM (NEW) SERVICE LIMIT 24.987 mm (.9837 in) 25.000 mm (.9842 in) 25.020 mm (.9850 in)
Compress valve springs no16 and no17, use valve spring compressor clamp (PN 529 035 764) and valve spring compressor cup (PN 529 035 724)
WARNING
Always wear safety glasses when disassembling valve springsBe careful when unlocking valvesComponents could be expelled under pressure from preloaded springReplace parts that are not within specifications
Installation
For installation, reverse the removal procedurePay attention to the following detailsCAUTION: The camshafts are not identical in designDo not invert the camshafts during assemblyAny mix-up of the components will lead to engine damageInstall camshaft then place the camshaft lock in the slot