[Roidfingers]

Was gonna change plugs and I still plan to. Was looking on the microfiche and doesn't show individual wires that I can tell. What is the usual change or I am missing something. TIA

 

[J-T]

What bike?

 

[longdistancerider]

The SOHC 450's have the wires incorporated into the coil, not replaceable. That's ok since the are a metal core wire and unlike the common graphite they virtually never fail. You can check the secondary resistance of the coil bu using a probe in each wire with a VOM set to ohms. Spec is 7.2K to 8.8K ohms.
I would replace the plug end caps since they're probably original, NGK part # XD05F. They are 5K ohm resistance pieces

 

[Roidfingers]

The SOHC 450's have the wires incorporated into the coil, not replaceable. That's ok since the are a metal core wire and unlike the common graphite they virtually never fail. You can check the secondary resistance of the coil bu using a probe in each wire with a VOM set to ohms. Spec is 7.2K to 8.8K ohms.
I would replace the plug end caps since they're probably original, NGK part # XD05F. They are 5K ohm resistance pieces

so whats the alternative if you have a bad wire?

 

[longdistancerider]

so whats the alternative if you have a bad wire?

Coil replacement. You have the choice of running the stock coil or doing the GM coil mod, there's a sticky in this section on that.