Are Plug caps supposed to have resistance?

[zoommx]

I was doing some checks on my ignition circuit and found the spark plug cap has over 1k ohms resistance. I had a new MSR cap in my parts supply and checked it...<1ohm. Do stock caps come with resistors in them or is something wrong with it? BTW 98 YZ250

 

[Gary B.]

I believe the OEM caps have resistors built in to supress radio noise and RFI. If the original has a resistor, I would make sure a replacement would have the same, or damage to the ignition components could occur.

 

[zippy1]

The OEM caps have resistance in them to supress EMI, That is correct. You won't do damage by removing the resistance. What you will do is get a hotter, more reliable spark. I allways toss my stock wires and caps on any of my bikes and snowmobiles. I use MSD car wires, they have the least resistance I have found in any wire on the market(less than 50 ohms per foot) and they have never given me any trouble