BOMBARDIER 1996 Ski-doo MX Z440 Handbook page 127

If the RAVE valve opens too late, the engine will bog or hesitate momentarily as the RPM increases.
Full peak performance (item 6) is still available. From a functional Point of view~ it is be~er to have
the valve open a bit early than a bit late. This fact is due to certain dynamic conditions that exist on
the snowm-obile, i.e., the clutch and torque converter.
85%
70%
65%
60%
35%
A018 002005
3000 4000
3500
'88 Formula Plus (537 engine We) power curve
---------
'89 Formula Mach 1 (583 engine We) Power cu~e
Power gain
Section
04
7000
5000 6000
5500 6500
4500
ENGINE PREPARATION
8000
7500 8500
04-25