Looks like the BR8EIX is the stock option. Stick w/ stock plugs or upgrade? Would they be as reliable? Ruthenium plugs are N/A for the RD400. I can tell you on my 2006 Honda Civic that the Ruthenium plugs idle better, smoother off the bottom and right where the torque curve is, it is a little quicker revving. I ran a cheap set of G NGK's (interim) and it was terrible...hesitant off the bottom and engine even sounded like it was struggling.
I think I read (especially w/ iridium/Rutheniums), that it should require less spark energy or easier on the ignition.
Ignition is XR700 Fireball (for the RD, NOT the Honda :haw:).
your opinions/experience?
ive never had issues with regular b9es or b8es. ive run iridiums , had them in the RZ but for no other reason than i just wanted to try them. they are more forgiving against fouling, like leaving the choke on too long, etc, but otherwise no real need.
Thanks Mark,
Will stick w/ the stock plugs. BTW, those plugs I pulled off the motor I am working on were black on the rim and dark chocolate over everything. Planning on new XR700 & 3/5 ohm coil. The other CDI's look like a bit of work...eh the electricals especially. The fireball works better than the original allison / crane ignition. On the RD350, it (allison) would "lurch" if you hit a bump...very unsettling while ripping along. I haven't noticed the "lurch" on the RD400.