This video demonstrates the process of machining an additional spark plug hole into a Shovelhead motorcycle engine head. The creator highlights the speed and efficiency of the modification when performed with the correct equipment and expertise. The description details the benefits of dual spark plugs, including faster starting and cleaner, more efficient fuel combustion. It also specifies the plug hole size (9/16ths 14mm) and mentions compatibility with early Sportster heads and Shovelheads.
You've reached the end! 1 videos loaded.
Gun Laws by State
Read firearms regulations for all 50 states + D.C.
Find Gun Dealers
Search licensed FFL dealers near you.
