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CB550K3 plugs

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Ashdowner:
Final final comment is that on the NGK website it states that there is absolutely no effect on plug performance or potential damage to anything if you use resistor spark plugs with resistor caps.

JamesH:
On the 750's the total impedance of each side of the ignition circuit should read 25 kOhms (assuming you use 5 kOhm resistor plug caps). So if you meter between ht leads 1&4 (with caps removed) you should get 15 kohms, and with 5 kOhm caps fitted you get the 25 kOhms total. I use this as a rule of thumb on both my 550's and 750's and has never let me down. This all assumes you're running non-resistor plugs (eg D8EA on the 750's). If you need to use resistor plugs (eg DR8ES) then use non resistor plug caps.

Bryanj:
NGK are correct in that there is no difference in plug performance but there can be a difference in coil performance

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