10-08-2017, 07:36 PM
My new to me "special" ( Cambridge finned head, 2x SU H? carbs) came with NGK B6HS plugs. Looking at the old forum people were using NGK BP5ES plugs successfully. As I think a couple of my plugs were dodgy I bought 4 new BP5ES (less than £6 delivered for the 4) which arrived today. The reach is about 20mm compared to the current ones about. 13mm. Are these new plugs going to be ok do you think?