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Hi All,
Fired my bike up yesterday after a summer of working on it. I've rebuilt the carbs, installed new airbox and intake boots/o-rings, checked for leaks while its running, re-shimmed the valves, all the usual GS rebuilding steps. It was put away in the first place because cylinder 3 was not firing and was running poorly in general.
The same issue came back where cylinder 3 would not fire. The Blogs plug cap can be removed while it's running without having an effect on the idle. Cylinder Forum is stumbling and the bike runs noticeably smoother when Forum plug cap is disconnected.
This is leading me to believe that the 2 - 3 coil is bad. When testing the Blogs spark on the block with a screwdriver, it looked very weak. When testing the coils, both primaries read 4.2 ohms and both secondary's read 12 kOhms without the plug caps installed. The plug caps (except for #3) are reading around 10 kOhms as well. I couldn't get a reading on it before I took it apart, but I'm assuming that it is similar as it still did deliver spark when tested. One thing I should note is that I am almost certain that the timing is off, but it is not far enough off for the bike not to run.
I am contemplating whether or not to order 2 new coils. The secondary reading is a bit low, but serviceable from what I've read. It could just be the plug caps, but I'm just not sure. If anyone could throw in their $0.02 I'd really appreciate it.
Fired my bike up yesterday after a summer of working on it. I've rebuilt the carbs, installed new airbox and intake boots/o-rings, checked for leaks while its running, re-shimmed the valves, all the usual GS rebuilding steps. It was put away in the first place because cylinder 3 was not firing and was running poorly in general.
The same issue came back where cylinder 3 would not fire. The Blogs plug cap can be removed while it's running without having an effect on the idle. Cylinder Forum is stumbling and the bike runs noticeably smoother when Forum plug cap is disconnected.
This is leading me to believe that the 2 - 3 coil is bad. When testing the Blogs spark on the block with a screwdriver, it looked very weak. When testing the coils, both primaries read 4.2 ohms and both secondary's read 12 kOhms without the plug caps installed. The plug caps (except for #3) are reading around 10 kOhms as well. I couldn't get a reading on it before I took it apart, but I'm assuming that it is similar as it still did deliver spark when tested. One thing I should note is that I am almost certain that the timing is off, but it is not far enough off for the bike not to run.
I am contemplating whether or not to order 2 new coils. The secondary reading is a bit low, but serviceable from what I've read. It could just be the plug caps, but I'm just not sure. If anyone could throw in their $0.02 I'd really appreciate it.
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