1982 gs550l bike wont run and coils only spark sometimes...HELP!

[mike_of_bbg]

Look back at post #3. Caps are about $5/ea.


There's no reason to expect that your coils will spontaneously go bad - especially if you have two pairs to swap in.

[1948man]

The resistance you're looking for is 30K to 40K ohms approximately. Therefore, you need to set your meter to the next setting higher than 40K ohms. On my meter that is 200K ohms. 20K ohms is too low of a setting but if it actually gave the 12 ohm readings, maybe that is the true reading.

[1948man]

So the stock OEM caps just twist-pull off? I need to check mine. Just wanted to be sure before I break something.

[1948man]

Well, I just pulled the caps off a coil that measured 36K ohms. Measuring without the caps, I goth 12.8K ohms similar to what Defore got. Does that mean the stock caps actually have about 12 k ohms each or does it mean the coils are weak and the extra resistance in the caps was hiding it? Any chance anybody else could measure the wire to wire resistance in a known good coil with the caps off? Seems like quite a coincidence that I got the same value that Defore got on several coils.

[Defore]

I just want to say this site and the ppl on it are amazing. I bought a set of coils but they were over heating so the ebay member gave me a full refund. Thank god because all 4 of the small caps weren't putting out any resistance. Thank you everyone for your help.

[1948man]

The coils that you have showing 12K ohms with the caps off may be okay. Measure the resistance in the caps. It may be high enough to reach a total resistance of 30-35K ohms with the coils and 2 caps. I'm speculating about this possibility in this thread.

http://www.thegsresources.com/_forum/showthread.php?t=174258

[mike_of_bbg]

Just checked my coils (with caps) & they're measuring 24k each. That's with brand new 5k NGK caps, so the no-cap impedance should be right around 14k. 12k is not far off from that.

[Defore]

Yes I found out that 2 out of 4 caps were not giving me an ohm resistance making the plugs some times spark and some times not. Tonight I plan on putting on the coils and pulling the carbs that have been soaking in purple power out and put them back on. Ill keep it posted. Thanks a lot everyone

[1948man]

If I understand u right and u have 4 coils from 2 bikes, maybe you can get 4 decent caps together