KTM 300 1998 User Manual

6
6.1 Checking the voltage regulator (Tympanium)
NOTE: THE VOLTAGE REGULATORS ARE CONNECTED DOWNSTREAM OF THE SWITCHES. ONE OF
THE VOLTAGE REGULATORS REGULATES ONLY THE BRAKE LIGHT CIRCUIT
, THE OTHER REGULA-
TES THE CIRCUIT FOR THE HEAD LIGHT, THE TAIL LIGHT, THE SPEEDOMETER ILLUMINATION AND
THE HORN
.
A defect voltage regulator can cause different kinds of trouble:
● N
O VOLTAGE IN THE CIRCUIT
In this case, the voltage regulator must be disconnected at idle speed. The vol-
tage regulator is defect if the power consumers now work properly.
If the power consumers are still not supplied with power, the switch, the wiring
harness or the ignition system must be checked for defects.
● E
XCESSIVE VOLTAGE IN THE CIRCUIT
The bulbs burn out.
Connect a voltmeter (yellow cable = positive, brown cable = negative) to check
the voltage. Start the engine and switch on the power consumers.
At an engine speed of 3000 r.p.m, the voltage regulator must supply a voltage of
12.0 - 14.0 V A.C. At higher engine speeds, the limit of 14.0 V should not be excee-
ded either.
If the reading significantly deviates from the nominal value, replace the voltage regu-
lator.
6.2 Checking the voltage regulator-rectifier (Shindengen)
– Start the engine and switch on the low beam.
– Connect a voltmeter to the two terminals of the capacitor (red/white cable =
positive, brown cable = negative).
– Accelerate the engine to a speed of 5000 r.p.m. and read off the voltage.
N
OMINAL VALUE: 14.0 - 15.0 V
In the case of a significant deviation from the nominal value:
– Check the capacitor
– Check the connector between the stator and the voltage regulator-rectifier and
the connector between the voltage regulator-rectifier and the cable tree.
– Check the stator.
– Replace the voltage regulator-rectifier.
6.3 Checking the voltage regulator (Kokusan)
A defect voltage regulator can cause different kinds of trouble:
● N
O VOLTAGE IN THE CIRCUIT
In this case, the voltage regulator must be disconnected at idle speed. The vol-
tage regulator is defect if the power consumers now work properly.
If the power consumers are still not supplied with power, the switch, the wiring
harness or the ignition system must be checked for defects.
● E
XCESSIVE VOLTAGE IN THE CIRCUIT
The bulbs burn out. In this case the voltage regulator must be replaced.

KTM 300 1998 Specifications

General

Starting System	Kickstarter
Engine type	2-stroke single-cylinder
Bore x Stroke	72 mm x 72 mm
Cooling system	Liquid cooled
Fuel system	Carburetor
Lubrication System	Premix
Ignition	CDI