Instruction Manual

Electrical System
111
5. Stator check: See Figure 7.28.
5a. Key OFF, unplug the stator from the regulate/
rectifier.
5b. Check resistance through the stator using a dig-
ital multimeter set to read Ohms.
• It should be between 0.1Ω and 0.14Ω.
• A high reading indicates a fault in the windings.
• A low reading indicates a short in the windings.
• There should be a reading of O.L. (Open Line)
between either lead and the engine block.
• It is good practice to check the stator cold, and
again when the engine is at operating tempera-
ture.
5c. Check the raw output of the stator.
See Figure 7.29.
• Connect a meter set to read Volts A.C. to the
output leads of the stator.
• Start the engine and advance the throttle to
3,000 RPM.
• The stator should produce at least 26 Volts A.C.
In some cases, output will be as high as 34
Volts A.C.
5d. Interpretation:
• If the stator fails either or both tests, it is likely to be
bad.
• If the stator fails the output test, but passes the
resistance test, there is a possibility that the mag-
nets on the rotor (flywheel) have lost their fields.
This is theoretically possible, but extremely rare in
practice.
• It is necessary to remove the flywheel to test the
magnets. If the magnets inside the flywheel will
draw a steel screwdriver to them, they are good. If
not, the flywheel must be replaced.
Figure 7.28
Figure 7.29