17. IGNITION SYSTEM MXU 250R/300R Measure the spark plug cap resistance. Remove the spark plug cap and measure the spark plug resistance. Resistance: 4.25.2K/20C Measure the resistance in the XK range of the electric tester. Ignition Coil CDI Tester PERFORMANCE TEST Test the performance with a ignition unit tester. · Operate the ignition unit tester by following the manufacturer`s instructions. · Use the special connector to connect the ignition unit. Spark Plug CDI Unit If the spark is weak, inspect the spark plug and ignition unit. If both of them are normal, replace the ignition coil with a new one. PULSER COIL INSPECTION Remove the front fender. (Refer to the chapter 2) Disconnect the pulser coil wire coupler and measure the resistance between the blue/ yellow and green/white wire terminals. Resistance: 105110/20C Refer to the "A.C. GENERATOR/FLYWHEEL" section in the chapter 16 to remove or install. 17-7