Engine Stop Switch Electric Current Check
Disconnect the engine stop switch lead.
Start the engine.
Ground the stop switch lead of the main harness side
while the engine is running.
If does not stop the engine, replace the C.D.I Unit.
Crankshaft Sensor Inspection
Magneto Lead Connector (see Flywheel Magneto In-
Set the hand tester [A] to the × 100 Ω range and connect
it to the Green/White [B] and White/Yellow [C] Leads in
Special Tool - Hand Tester: 57001-1394
If there is more resistance than the specified value, the
coil has an open lead and must be replaced. Much less
than this resistance means the coil is shorted, and must
Crankshaft Sensor Resistance: approx. 240 Ω at 20°C
Using the highest resistance range of the tester, measure
the resistance between the crankshaft sensor leads and
Any tester reading less than infinity (∞) indicates a short,
necessities replacement of the crankshaft sensor assem-
Crankshaft Sensor Air Gap Adjustment
Loosen the crankshaft sensor screws [A].
Insert a thickness gauge [B] between the crankshaft sen-
sor core and the timing plate.
Thickness Gauge: 0.65 mm (0.026 in.) KX250-R1, R6F
While pressing the crankshaft sensor toward the magneto
flywheel, tighten the coil screws and remove the thickness
Check the air gap (see Flywheel Magneto Installation).
If the air gap is not within the specified range, readjust the
0.85 mm (0.033 in.) KX250R7F
ELECTRICAL SYSTEM 15-21