It also explains the precious metal electrode nicely. Since it has a higher melting point it can be narrower and again, gives you a cleaner, more precise spark resulting in better performance, whiter whites, britghter colors, and world peace I think at least one user noted better performance (notably more stable idle IIRC) with a precious metal plug.Scott
Hey Folks, I run Bosch dual electrode plugs in my Enfield and my 79" Harley Shovelhead. I also run dual electrode plugs in my Cessna 150. As far as I know, all air cooled aircraft engines run dual electrode plugs for reliability. That's good enough reason for me to use them in my motorcycles. Just my opinion !
I said one user, not you
. The ONLY difference that i found was in the hot starting - it usually took a couple more cranks (literally two ...) to fire the lean-ass mixture in the hole with the single electrode plug .... but that's ALL.Jjoe 226 has it right with his ..... they are PERFECT as for what they should be .... Of course the ULTIMATE plug would be a surface gap one .....
Scooter Bob is showing his deeply technical side.
Half a hour ago, I couldn't even SPAIL Muh-Kanick ..... Now I are one!
I installed the NGK BPR6ES today. With a little grease on the threads it hand tightened smooth as can be. The OEM Bosch R6 plug was rough to get out with ratchet and plug socket. The black Bosch tip verifies what the dyno test read regarding the air/fuel mixture. Would a hotter plug be a better thing to have in there?
Feels about the same to me so maybe your original plug was dodgey. I'll report more after it's been in a while. Scott
My plug gets black like that round the rim and the first couple of threads, so do the plugs on the other bike. I'm told by those who seem to know that this is fine as long as the business part is a nice tan colour, which it is.
Looks lean to me. Of course with the air box mod youve made with the exhaust you were running, would be suprised if you werent a little lean. I will be looking forward to seeing the NGK after 300 miles or so, glad to hear your having the same good results with them that I and most who installed them are experencing.
... Of course the ULTIMATE plug would be a surface gap one .....