I've been searching, to find out which plug I need for my moped. the auto zone people have the NKG B6HS listed as the one for my motor. Moped Junkyard lists Bosch W7A. I figure that I should go with Bosch- keep it all european, but was wondering which platinum plug to go with.
A lot of people recomend the Bosch Platinum 4214... Is this a correct cross reference fo the one I need?
I'm thinking about just buying a pile of plugs (if I can find them) and seeing what works best.
Also, does the heat range of the plug affect the actual running tempuraature of your engine? Would it be better to run a cooler plug in a hot climate?
Or, would a too- cool plug cause the mix to burn later, same as advancing your timing?