A. spark plug details given B. DIRECTIONS FOR USE C. instant price AND FEEDBACK D. complete PLUG models AUTO spark plug, spark plug C7HSA examples show here ... AND DIRT.2. SET THE SPARK PLUG ONTO THE CYLINDER HEADAND, TIGHTENNING AND KEEP THE SPARK PLUG TO TURN 90°~180°. ... IT MANY TIMES BEFORE.3, MAKE SURE SPARK PLUG RIGHT INSTALLATION. SPARK PLUG HOUSING BREAKS IF TOO TIGHT WHILE MOTOCYCLE SHAKES ...