projected or non projected spark plugs?

[Black wing]

i am trying to get a set of non resistor spark plugs, i can get them but without the projected tip. does it make a big difference on our bikes?

[jasonm.]

NGK DP8EA-9 is the non-resistor type...notice the "R" is gone. "P" means projested tip. Which should be used. I got them at Advance Auto. They order them. But these spark plugs failed internally within 12 months with me. They "opened up" to infinite resistance. I have had 6+ NGK spark plugs do this in the last 4 years. No more NGK for me. I now use Denso iridium IX24B...yes these are resistor type. .. work great so far. But They are only available on the internet for me

Edited August 1, 2012 by jasonm.

[Black wing]

i only plan on having these in for a month at most to get everything tuned so ngk should do

[jasonm.]

Make sure your resistor caps are good.OEM spec is 10k. Too little resistance can hurt the igniitor. NGK spec. is 5k. Thus with NGK caps must use resistor spark plugs.

[Black wing]

so what do you recommend? what brand is the most reliable?

[jasonm.]

here is a part# for STANDARD Denso resistor plugs X24EPR-U9. NOT EXPENSIVE. Again, I do not trust NGK. Some use Autolite 4163 available anywhere.. But they have poorly made threads,compared to the Jap plugs...ugh! Get the Denso

[Black wing]

what store sells them? there are no canadian listings i can see are champion plugs worth anything?

[jasonm.]

what store sells them? are champion plugs worth anything?

If not stocked...any shop... The Denso's can be ordered. I have not used champions in 20+years. So I really cannot comment on them