Bombardier SeaDoo 2000 factory shop manual volume 1, Page 138Get this manual
Section 04 ENGINE Subsection 07 (ROTARY VALVE)
Remove cover then clean and measure compressed soldering wire thickness, it must be within the specified tolerance 0.30 0.05 mm (.012 .002 in)If rotary valve cover clearance is over specified tolerances, machine rotary valve cover seating surface or replace the coverMACHINING INFORMATION The amount of material over tolerance must be removed from the rotary valve cover seating surfaceAlso cut the O-ring groove the same amount to keep the 1.00 0.03 mm (.039 .001 in) depth between the bottom of the groove and the seating surfaceRemove burrs on the edges of the seating surface and O-ring grooveManually feel backlash at one position, then turn crankshaft about 18 turn and recheckContinue this way to complete one revolutionBacklash must be even at all positionsOtherwise overhaul engine to find which part is faulty (gear, rotary valve shaft or crankshaft with excessive deflection)
DISASSEMBLY
Rotary Valve Cover
Unscrew retaining screws and withdraw rotary valve cover no1 and rotary valve no13