They are designed to reduce the RFI(Radio Frequency Interferrence)heard on radio's and T.V.'s. You can run copper sparkplug wires with no resistor caps(that's what the bikes came with from Kawasaki)for slightly better spark energy, but do not run supression sparkplug caps and supression wires together as it will greatly reduce the spark output. A forum member here recently was going round and round, wondering why his bike had such low spark, he found out,after spending $$$$, use one supression system, not both.
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
