Review on NGK VD05F Resistor Spark Plug by Jose Isaacs

Seems to be the magic bullet for the loose spark plug cap problem on my GY6 150cc scooter. The standard spark plug cap constantly pops out of the plug while driving due to engine vibration, the cheap construction of the standard spark plug cap terminal and the weak retaining clip. This NGK cap has a heavier plug that seems to work better with studded spark plugs found on smaller engines. (I'm using CR7HIX) Installation is pretty easy. It is not necessary to strip the insulation from the cable. Simply remove the rubber boot from the old cap, unscrew the old cap from the ignition wire and screw on the new one. So far so good, let's see how long it lasts without a spark plug.