1999 Ski-Doo Factory Shop Manual Volume Two, Page 108Get this manual
Section 04 ENGINE Subsection 03 (494, 583 AND 670 ENGINE TYPES)
REMOVAL FROM VEHICLE
Disconnect or remove the following from vehicle air intake silencer belt guard and drive belt drive pulley carburetors and throttle cable at oil injection pump impulse line, oil supply line and rotary valve shaft lubrication hoses then plug all these hoses ignition coils and ignition module electrical connector housings drain the cooling system and disconnect hoses from the engineRefer to COOLING SYSTEM 04-08 screws retaining support to frame
3,4,5, Tuned Pipe, Tail Pipe and Muffler
These parts are identified on welded hookSecond number sequence of PN is stamped on partA06C1JA
1Example: 0392 for 514 039 200
ENGINE SUPPORT AND MUFFLER DISASSEMBLY AND ASSEMBLY