BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 142

Section ENGINE PREPARATION
04
o
NOTE : Bombardier Corporation has running changes on rotary valves used in our
snowmobile product line. The shape of the leading or trailing edge may not conform to the
drawing shown in some technical materiel (example follows).
This change is for reliability and does not affect performance in any fashion. The valves are
interchangeable, but do carry different part numbers.
420924200 subs to 420924504
420924205 subs to 420924508
420924209 subs to 420924502
OLD STYLE ROTARY VALVE
NEW STYLE ROTARY VALVE
04-40