15. IGNITION SYSTEM Mongoose/KXR 90/50
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· Check the ignition system according to the sequence specified in the Troubleshooting.
· The ignition system adopts ignition unit, change gear control and the ignition timing cannot be
adjusted.
· If the timing is incorrect, inspect the ignition unit, A.C. generator, change gear control and
replace any faulty parts. Inspect the ignition unit with a ignition unit tester
· Loose connector and poor wire connection are the main causes of faulty ignition system. Check
each connector before operation.
· Use of spark plug with improper heat range is the main cause of poor engine performance.
· The inspections in this section are focused on maximum voltage. The inspection of ignition coil
resistance is also described in this section.
· Inspect the spark plug referring to chapter 3.
SPECIFICATIONS (Mongoose/KXR 90)
Item Standard
Spark plug Standard type NGK-C7HSA
Spark plug gap 0.60.7mm
"F" mark
Ignition timing 281BTDC/4000RPM
Full advance
Primary coil 2.22.6
Ignition coil resistance (20) Secondary without plug cap 3.14K
coil with plug cap 8.39K
Pulser coil resistance (20) 121.1
SPECIFICATIONS (Mongoose/KXR 50)
Item Standard
Spark plug Standard type BR8HAS
Spark plug gap 0.60.7mm
"F" mark
Ignition timing 15BTDC/1700100rpm
Full advance
Primary coil 3.715.2
Ignition coil resistance (20) Secondary without plug cap 3.51K
coil with plug cap 8.81K
Pulser coil resistance (20) 80160
15-3
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