Bosch is the original supplier to BMW and world renowned as being on the cutting edge of spark plug technology among so many other specialized products.
BMW specifies this Bosch plug in combination with an NGK main spark plug. If you prefer to use all NGK plugs, then the NGK equivalent to this spark plug is part number 8610012.
This is the 12mm bottom spark plug is for two-spark models. For the main spark plug, also order two of part number 8610010 NGK BKR7EKC. (See the Related Products)
This is the direct OEM replacement spark plug for your bike. Equivalent to BMW Part number 12 12 7 681 415 (12127681415)