resistor plugs

Just for general knowledge will a resister plug make my 1982 xj 750 run worse and if so , why. I noticed i have 2 regular plugs and two resistor plugs? My bike is runs a little rough.

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Which spark plug caps do you have? Are they the original resistive (5K Ohm) caps?

Have you tested the coils and caps? https://www.xjbikes.com/forums/threads/how-to-test-ignition-coils-and-plug-caps.130696/

 

NGK discontinued the non-resistor versions of the plugs. I havent measured the caps on my 83 750 maxim, butI assume mine are tmstill the originals with the internal resistor. Am currently running resistor type plugs, and thongs seem to be ok with mine.

 

Check this thread: https://www.xjbikes.com/forums/tags/correct-resistance/

 

I did not check my caps. Put in resistor plugs. One plug failed to spark in like 200 miles.
Put in non resistor plugs and all has been good since.
Its on my list over the winter to switch to non resistor cap and go resistor plugs.

 

Your bike originally ran non resistor plugs and 5k ohm resistor caps. Non resistor plugs are getting hard to find so you can take the resistor out of the cap and replace it with a solid piece of copper wire and use resistor plugs. I would check the resistance of those caps as they may be out of spec. If by chance the stock caps were 10k ohms buy new 5k ohm caps and run resistor plugs which will be 5k ohms. Most bikes ran a 5k ohm resistance but a few were 10k.

 

i have the original caps , and thank you for this info it looks solid, i will go through it and check it out

 

I wont get to it for another week . I will check this out ive never done this just pull out ther resistor and you probbaly have to sotter a piece of copper wire in place

 

You just need a section of copper rod, same diameter as the resistor and same length. I think Len at XJ4Ever has dummy resistors also.

 

I thought Len had some of the non-resistor plugs. Might ask.

 

All Canadian bikes had resistor plugs and 5k caps