xj900 -83 ignition coil resistance

Hi,

As a backgroud, I bought the xj900 1983 this summer and have not run basically at all with it. Just tested that motor was running somewhat good (had a lot of air leaks in intake). Now I have basically disassembled the whole bike and building cafe racer style bike from it.

I have now measured ignition coils and got following readings from both coils:
Primary: 3,0 ohms
Secondary: 11,9k ohms


For all XJ900RK, RL, N, FN, and F models:

Primary (input from TCI): 2.7 ohms +/- 10%
= 2.43 ohms - 2.97 ohms acceptable range

Secondary (output to spark plugs): 13.2K ohms +/- 20%
= 10,560 ohms - 15,840 ohms acceptable range


So secondary measurements are clearly under tolerances but how about primary ones? Becaause those are a bit over threshold? Is it a sign that coils are worn out and needs to be replaced?

 

I tried to add page url to post from where I found those reference numbers but for reason or another forum sw was saying I am spamming. Page was xj4ever

 

I think you can round the second decimal place up. Your meter might have more error than that. Just my opinion, may be wildly wrong.

 

I was thinking that one too. But liked to hear some opinions because resistance is on upper limits.

 

Very common to be slightly high using a common DMM - you can subtract the reading you get from touching the probes together or to one of the terminals under test.

I would say if the coils are in good physical shape with no cracks you are good to go.

 

Coils are in a good physical shape, no cracks etc. It was very minimal reading what I got by touching the probes together, like 0,02. So subtracting that from 3.0, I am almost in allowed tolerance