Usually the size of socket comes in a socket set. Most common size is 5/8.
youll need a 5/8 superdeep plug socket
5/8
13/16 inch
13/1613/16
i believe a 5/8 deep well socket is the one.
18mm thin wall socket normal socket will not work
Remove plug wires and you can then reach plugs using a long (8') extension and proper size deep well socket and a ratchet(of course).
19mm thin wall.
You will need a 5/8 socket to remove the plugs from your 750 Honda motorcycle. A deep well socket is recommended.
5/8
Probably 5/8" or 18mm But the socket won't fit down the hole for the plug. I tried a 13mm thin wall socket. It doesn't fit!