Karate.Snoopy
Junior Member
One of the reasons gap could be twice as important on our bike is it uses 2 coils for 4 spark plugs. One coil for #1 and #4 cylinder and one coil for #2 and #3 cylinder. What happens is the coil fires at TDC and the end of the exhaust stroke for each piston that is mechanically at TDC and end of exhaust stroke. In other words pistons #2 and #3 are both in the same position in the cylinder but they are at opposites in firing and exhaust. One being the end of compression and beginning of power. The other cylinder would be the end of exhaust and beginning of the intake. So the coil is firing twice as many times as a coil that is dedicated to one cylinder. Dielectrically there is more stress on the coil pack because the path for it's spark has been increased. It is more likely to create corona (with increased gap) internally and break down internally or when there is an insulation problem it may more readily take that path and not produce a strong or weak spark where we want it. The coils are looking a 2 plugs... Be careful setting the Iridiums!
Set your gap to factory specs!
:bow::bow::bow::bow:
I am thinking about pulling out the Iridiums and installing the Standard NGK's and setting the right gap.
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