1OE Number: The referencing OE number of this ignition coil is 30530 102 780, which is molded and designed depend on the original data. 2Fitment: The ignition coil with spark plug cap is a replacement for CM91 C90M 19661969, for CT90 Trail 19661979, please check the model and year before ordering. 3Parameter: The primary resistance is 8 ohms +/ 10%, and the plug cap is a 5 ohm resistor type, with 6V voltage, effective increase ignition energy for quick start up. 4Function: Improve engine operating efficiency and electrical performance, better recovery and response, directly replace old or damaged ignition coils. 5Easy Installation: Easy to install, no modification, cutting, or drilling required. It adopts original standard, which is a perfect replacement and can perfectly match.