HOME and how to join Forum Open Area General Scott topics Spark plugs Re: NGK B7HS


When I bought my bike it came with a pair of NGK B7HS plugs but they look like they have been in the engine for a looong time so I thought a change would be good.

Some folks seem to like the Iridium plus but they are all resistor types.

The B7HS fitted means that I have 14m holes and implies short reach but I don’t know how to go about confirming that reach is indeed 1/2″