Bombardier SeaDoo 2001 factory shop manual, Page 166Get this manual
Section 04 ENGINE Subsection 07 (ROTARY VALVE)
ROTARY VALVE TIMING
CAUTION: Never use the ridge molded in crankcase as timing markThe following tools are required to measure rotary valve opening and closing angles in relation with MAG side piston.50
Proceed as follows: Turning crankshaft, bring MAG side piston to Top Dead Center using TDC gauge1
350 360 10 20 340 10 360 350 20 40
270 280 290 30 110 100 90 80 31 70 60
529 035 607
90 100 11 280 270 26 0