16. IGNITION SYSTEM ATV 50 SPECIFICATIONS Item Standard Standard type BR8HAS Spark plug Hot type Cold type Spark plug gap 0.60.7 mm (0.024 "F" mark Full MXU 50/MX'ER 50 22BTDC/2000100rpm Ignition timing advance MXU 50 REVERSE 13.5BTDC/1500100rpm Primary coil 0.20.3 Ignition coil resistance (20°C) Secondary with plug cap 8.09.3K coil without plug cap 3.04.2K TROUBLESHOOTING High voltage too low No high voltage · Weak battery or low engine speed · Faulty ignition switch · Loose ignition system connection · Faulty CDI unit · Faulty CDI unit · Poorly connected or broken CDI 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 CDI or incorrect ignition timing · Faulty change gear control unit · Improperly tightened A.C. generator flywheel 16-4