Arctic Power Valve (Apv) System - Arctic Cat S2009F5DFCUSG Operator's Manual

1. Adjust the seat to the lowest posi-
tion; then while lifting on the top
forward part of the seat, remove the
self-tapping screw from the right
side of the seat support assembly.
2. Press in on the left-end of the seat
adjuster lever at the rear storage
compartment; then pull out on the
seat adjuster lever.
3. Lift on the back of the seat and
move it forward and upward to
remove it from the chassis.
! CAUTION
Do not use the adjuster lever to lift
the seat.
To install the seat, use the following
procedure:
1. With the seat adjuster lever pulled
out, slide the front of the seat into
position on the chassis; then with
seat position selected, lower the
rear of the seat onto the rear stor-
age compartment.
2. Press down on the rear of the seat;
then secure the seat by releasing
the seat adjuster lever.
3. With the seat adjusted to the low-
est position, install the self-tapping
screw into the right side of the seat
support assembly.
26
Make sure the self-tapping screw
is securely tightened and the seat
is securely locked in place or per-
sonal injury may result.
ARCTIC POWER VALVE
(APV) SYSTEM
The correct engine oil to use is
Arctic Cat Synthetic APV 2-Cycle
Oil (p/n 4639-348). Any substitute
may cause an APV malfunction.
741-718A
This RPM
(servo) actuated system adjusts the size
of the exhaust ports to provide peak per-
formance throughout the RPM range.
The system consists of an exhaust
valve assembly mounted to the exhaust
side of each cylinder and connected by
adjustable cables to an electronic servo
mounted beneath the hood.
 NOTE: The mounting location of
the servo will vary from model to
model.
At low RPM, the exhaust valves are
held in the DOWN position by return
springs. This gives the engine a "low
port" exhaust design calibrated to pro-
vide maximum low RPM power and
improve fuel economy at trail speeds.
! WARNING
! CAUTION
controlled
GENERAL INFORMATION
servomotor
739-152F