Starter Motor; Ignition Timing - Arctic Cat 2012 DVX 90 Service Manual

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INSPECTING
1. Check stator for signs of overheating, broken wires,
or other damage.
2. Check the timing sensor for broken wires or signs of
damage.
INSTALLING
1. Install the timing sensor and stator onto the stator
plate. Secure with cap screws lightly coated with red
Loctite #271. Tighten to 8 ft-lb.
2. Install the flywheel (see Engine/Transmission sec-
tion).

Starter Motor

 NOTE: The starter motor is not a serviceable com-
ponent. If the motor is defective, it must be replaced.
REMOVING
1. Disconnect the battery.
CAUTION
Always disconnect the negative battery cable from the
battery first; then disconnect the positive cable.
2. Remove the starter motor from the engine (see
Engine/Transmission section).
3. Remove the nut securing the positive cable to the
starter; then remove the cable from the starter.
Account for an O-ring.
INSTALLING
Install the starter motor (see Engine/Transmission sec-
tion).
Regulator/Rectifier
The regulator/rectifier is located near the battery.
VOLTAGE
1. Set the meter selector to the DC Voltage position.
2. Test between the black and white wires (with the reg-
ulator/rectifier plugged in).
Troubleshooting
Problem: Spark absent or weak
Condition
1. Ignition coil defective
2. Spark plug defective
3. Magneto defective
4. CDI unit defective
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3. With the engine running at a constant 3000 RPM, the
meter must read 12.1-15.2 DC volts.

Ignition Timing

The ignition timing cannot be adjusted; however, verifying
ignition timing can aid in troubleshooting other components.
To verify ignition timing, use the following procedure.
1. Attach the Timing Light (p/n 0644-296) to the spark
plug high tension lead; then remove the timing
inspection plug from the right-side crankcase cover.
2. Using the Tachometer (p/n 0644-275), start the
engine and run at 4000 RPM; ignition timing should
be 28° BTDC ("F" mark).
3. Install the timing inspection plug.
If ignition timing cannot be verified, the rotor may be
damaged, the key may be sheared, the trigger coil bracket
may be bent or damaged, or the CDI unit may be faulty.
The connectors are the two-pronged white ones under the
front fender assembly.
BULB VERIFICATION
Visually inspect the bulb for broken filaments, blacken-
ing, or loose bulb base.
VOLTAGE
 NOTE: Perform this test on the main harness side of
the connectors. The engine must be running for this test.
1. Set the meter to the AC Voltage position.
2. Connect the black tester lead to one side of the con-
nector and the red tester lead to the other side.
3. With the engine running, the meter must show 9.0-
13.5 AC volts.
 NOTE: If the meter shows no voltage, inspect wiring
harness or connectors. If normal, perform a stator
coil test (see Stator Coil in this section).
Remedy
1. Replace ignition coil
2. Replace plug
3. Replace magneto
4. Replace CDI unit
Manual
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