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17. IGNITION SYSTEM MXU 250R/300R
SPECIFICATIONS
Item Standard
Spark plug Standard type DPR7EA-9
Spark plug gap 0.60.7mm
"F" mark
Ignition timing 51BTDC/1000RPM
Full advance
Primary coil 3.44.1
Ignition coil resistance (20) Secondary without plug cap 14.45K
coil with plug cap 19.8K
Pulser coil resistance (20) 105110
Ignition coil primary side max. voltage 14V
Pulser coil max. voltage 1.6V
Exciter coil max. voltage 14V
TESTING INSTRUMENT
Commercially available electric tester with resistance over 10M/CDV.
TROUBLESHOOTING
High voltage too low No high voltage
· Weak battery or low engine speed · Faulty ignition switch
· Loose ignition system connection · Faulty ignition unit
· Faulty ignition unit · Poorly connected or broken ignition unit
ground wire
· Faulty ignition coil ·Dead battery or faulty regulator/rectifier
· Faulty pulser coil · Faulty ignition coil connector
Normal high voltage but no spark at plug · Faulty pulser coil
· Faulty spark plug
· Electric leakage in ignition secondary circuit
· Faulty ignition coil
Good spark at plug but engine won`t start
· Faulty ignition unit or incorrect ignition timing
· Faulty change gear control unit
· Improperly tightened A.C. generator flywheel
17-3