I have given up on getting the Splitfire plugs. I cannot seem to find them in any stores anywhere. I did order some online, but still havent gotten them after two months. Come to think of it, I never got a confirmation email and they never did actually charge me. So, they are out. I did hear a rumor that Splitfire went out of business, but haven't been able to confirm that.

So.... Anyway... Besides the NGK Iridium Plugs (DPR9EIX-9), I have noticed that Denso also makes an iridium plug (IX24B) for our bikes.

Here are the specs on the Denso Iridium IX24B:
Iridium plug, 12mm thread, 19mm reach, 18mm hex, gasket seat, 0.4mm iridium projected center electrode, tapered cut U-groove ground, resistor, 0.35" gap

Here are the specs on the NGK Iridium DPR9EIX-9:
12mm, 3/4" reach, 18mm hex, gasket seat, projected tip, resistor, fine wire (0.6mm) iridium center electrode, tapered cut ground electrode, 0.36"gap

Just for the heck of it here are the specs for the Splitfire TP416B:
12mm, 3/4" reach, 11/16" hex, gasket seat, copper core, resistor, power tip, platinum fine wire center electrode, split "v" ground electrode w/platinum tips

So.... which ones should I get?

Soren