2004 Skidoo ZX Series Service Manual, Page 132Get this manual
Section 04 ENGINES (2-STROKE) Subsection 02 (593, 593 HO SDI, 693 AND 793 SDI ENGINE TYPES)
GENERAL
CAUTION: While performing any engine related procedure, always make sure that the working area is clean and free from dust or particles to reduce the risk of damaging the engine
DISASSEMBLY
RAVE System
NOTE: RAVE stands for Rotax Adjustable Variable ExhaustRemove RAVE valve cover no7 by removing screws no5
TROUBLESHOOTING
Before completely disassembling the engine, check airtightnessRefer to LEAK TEST AND ENGINE DIMENSION MEASUREMENTNOTE: The following procedures can be done without removing the engine from the chassis
WARNING
Firmly hold cover to valve baseThe compression spring inside the valve is applying pressure against the cover