DirtyErnie
Renaissance Hick
I sent this to NGK last week:
"I'm looking for information on available substitute plugs for the BP7ES indicated for my '80 XS650. I'm possibly looking at the "FR_" series as the hex diameter isn't all that critical (I don't have a 13/16" plug wrench anyways...). Changing to a resistor-style plug isn't a concern as I can switch to a non-resistor plug boot easily. Also, there's been much talk in the XS650 forums about the Iridium 'IX' series making noticible increases in torque and mileage on this old-style Hemi chambered engine. If you could include avaliable part numbers suitable as substitutes I would greatly appreciate it."
They gave me this back:
"The plug you want is a BKR7EIX-11 stock # 6988. This is a 5/8" hex and there is no need to change the resistor caps. The iridium plugs actually use less electrical voltage than a non-resistor standard plug.... meaning the coil has to work less to fire the plugs."
From their lit. it looks like it's the same plug with a 5/8" hex. I think I read another thread where someone was going to use the 'FR' series plugs, which I think are only available in a 4 or5 heat range. Leads me to think NGK's heat ranges are fairly consistent across the board if the 'FR' series has the same thread & hex combination as the BKR and they're recommending the BKR7. I'll get to the parts store at some time to double check all these physical differences.
E
"I'm looking for information on available substitute plugs for the BP7ES indicated for my '80 XS650. I'm possibly looking at the "FR_" series as the hex diameter isn't all that critical (I don't have a 13/16" plug wrench anyways...). Changing to a resistor-style plug isn't a concern as I can switch to a non-resistor plug boot easily. Also, there's been much talk in the XS650 forums about the Iridium 'IX' series making noticible increases in torque and mileage on this old-style Hemi chambered engine. If you could include avaliable part numbers suitable as substitutes I would greatly appreciate it."
They gave me this back:
"The plug you want is a BKR7EIX-11 stock # 6988. This is a 5/8" hex and there is no need to change the resistor caps. The iridium plugs actually use less electrical voltage than a non-resistor standard plug.... meaning the coil has to work less to fire the plugs."
From their lit. it looks like it's the same plug with a 5/8" hex. I think I read another thread where someone was going to use the 'FR' series plugs, which I think are only available in a 4 or5 heat range. Leads me to think NGK's heat ranges are fairly consistent across the board if the 'FR' series has the same thread & hex combination as the BKR and they're recommending the BKR7. I'll get to the parts store at some time to double check all these physical differences.
E
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