The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: steven m on August 18, 2011, 10:54:52 AM
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I realize this has been covered before but I'm afraid I'm still not completely clear on the spark plug issue. My 83 has the stock electronic ignition and the stock metal-cover spark plug caps, which I assume are the 5k resistor caps, right? So can I assume the NGK BP6ES are non resistor plugs, which they seem to be, or am I wrong? I ride in SoCal, it is not a track bike, and I am not a knee dragger, at least not on purpose.
Thanks
Steve
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If your plug caps are the originals or a correct replacement part they will be 5K resistor caps which is what is required for the electronic ignition bikes. If a replacement I suppose it's possible they could be the 1k ohm caps for the points ignition bikes. That seems unlikely though as I don't think the 1K ohm caps are available anymore. The parts fiches are all showing the same part number for both 79 - 80 bikes and 81 -84 bikes which will be a 5K Cap. You would have to measure them to be absolutely sure.
Your BP6ES is not a resistor plug. A BPR6ES would be a resistor plug.
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I use the BP6E V which is the platinum version of the "S". Getting hard to find. Also works in my Honda mover. ;)
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Better measure the resistance. I thought the metal cover original BMW sparkies were 1K resistance. NGK resistor plugs usually come in at about 4.3K.
Currently using the BPR7EIX Iridiums with NGK 0 ohm caps (LZW). They have been on there for years and many thousands of miles. I think I'm over 30,000 miles on 'em now.
I might switch to the cooler BPR8EIX just to be different.