NGK CMR7H spark plug. 10mm thread, 1/2″ reach, 5/8″ hex, gasket seat, resistor plug. Also fits billet head kits for scooters and pocketbikes. When used in RC style engines the gap suggested 0.029 inches
Zenoah part # 3699-91867
HPI Part # 15454 or 3066
FG part # 07343/08
Can be used on All 23cc ~ 34cc RC Engine
GP460, or any other R/C style motor with same thread size on cylinder for plug.