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