650sx spark plug and cap question

I searched with no definitive answer. My questions is that I was thinking of replacing my old spark plug caps but I am not sure if I need resistor caps or not. Also should I use b7es or br7es plugs? my engine has a shaved head, aftermarket pipe and waterbox and 40mm keihin. This whole resistor thing is confusing. Any thoughts?
 
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dfw
Since the wires are solid it wont make much difference in RFI. Use caps that arent rigid so you can use a zip-tie.
 
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