Busted spark plugs? what do you mean?
You broke the ceramic tops? replace with new plugs and be careful installing them when removing the socket, the socket goes straight on and straight off do not pry it side ways you will crack the ceramic top.
Remove the spark plug boot from the spark plug you wish to remove. The spark plug boot is black rubber on the Yamaha Royal Star, located at the top of each cylinder. It is removed by simply pulling the boot straight off of the spark plug. You will hear an audible "pop" when the spark plug boot disengages from the spark plug head.
Insert the spark plug socket onto the spark plug, then the eight inch socket extension, then the socket wrench. Loosen the spark plug by turning the wrench in a counterclockwise motion, being careful not to hit the motorcycle fuel tank with the handle of the socket wrench. The spark plug will stick a little at first, but then will come out easily. Avoid allowing anything to drop into the spark plug hole while the plug is removed.
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