Question about 2000 Yamaha DT 125 R
Looks like your wiring has got spliced somewhere. Change the entire wiring
Posted on Dec 31, 2010
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Posted on Jan 02, 2017
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Ignition Theory of Operation
Mounted to the periphery of a flywheel are a pair of magnetic poles (south leading in clockwise rotation), generated by
a permanent magnet. By rotating the flywheel (magnetic poles) clockwise past the ignition module on a laminated core group, a voltage is generated in the primary winding (L1).
This generates a small bias current to flow through the control resistor (R1) to the base of (Q1). This base drive causes
the transistor to conduct (turns on) completing the primary circuit. Current flows from the high side of the primary winding
through the transistor (collector to emitter) to ground.
The trigger sensor (TS1) senses the optimum time (peak current) to remove the base drive from the transistor (Q1).
This abrupt "turning off" of the transistor causes an interruption in current flow which allows its associated flux collapse,
and several hundred volts is induced through the primary winding (L1) inducing a very large voltage in the secondary
When the secondary voltage reaches several thousand volts the spark plug (SP) gap is ionized and ignition
occurs. The placement of the trigger sensor internal to the ignition insures constant timing over speed and temperature
and prevents counterclockwise operation.
The diode (D1) in the ignition shut off circuit blocks inadvertent application of battery voltage, protecting the internal
components of the ignition. With the stop switch (SW) in the closed position primary voltage is routed to ground, preventing ignition operation.
has anyone had the wiring connectors apart in / and around ignition and charging systems?
this problems is very strange
please get back to me
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