Honda crf450 no spark atall plenty of power out of stator changed cdi nd had coil checked all ok tried dissconecting kill switch to.

To detect the stator coil of the magnet, it is generally necessary to measure the resistance value of the ignition coil and the trigger coil with a multimeter. As long as the resistance value is normal, the coil is generally fine. The resistance of the ignition coil is generally more than 300 ohms for most models, and the trigger coil is more than 100 ohms. The method of fire test is not necessarily accurate. If the measurement coil is normal, and the installation is correct, then check the igniter, the high voltage package and the electric door lock, the flame extinguishing line and the whole ignition coil. If the coil has a virtual connection, a short circuit or the internal contact of the electric door lock is bad, it will also cause high voltage fire or high voltage intermittent. Use igniters, high pressure packs and other replacement tests, must ensure that the quality of the accessories used is qualified, the model is appropriate, plug or install correctly, otherwise it may cause misjudgment. Related: honda CRF150L wapcar

Hi i have a 2003 just rebuild new piston rings kw valves spring ext.now i have no spark.i put my coil on other and it worked.what is it please driving me nuts

Maybe get a new spark plug.make sure your grounded(earthed). did you take the plug out and check for spark against the motor while you cranked the bike over?