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Canadian Daves JustKDX
KDX spoiled me for two strokes, KX60 running badly
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[QUOTE="reepicheep, post: 1399711, member: 104942"] Well, I am zeroing in on the problem... Nasty one, this. The issues were (so far): 1) Fouled plug(s). 2) Aggravated by bad coil. 3) Aggravated by bad ground for CDI (a real mystery, more later). 4) Aggravated by previous owner, who put a CDI for something other than a KX-60 in my KX-60. It was tricky. The original problem with the coil and CDI would quickly foul a plug, before the bike could even warm up. So even though you start with a stack of $6 plugs, every time you put a new one in, you are just fouling it. Go back to one of those fouled plugs (that don't look that bad) and even if you fixed some other problem, you think you didn't yet. Nasty. The coil was bad also. I slapped in a cheap Emgo universal coil for testing, *and* a new plug, and it is running very well. Still a bit of missing at past redline, but strong right up to there. The CDI has worked reasonably well in the past, but the wire colors are all wrong. It's a mitisubishi, so it probably came off some other Kawasaki. I haven't found one like it, but have a proper CDI on the way from ebay. The really odd thing was a grounding problem on the coil mounting tab (which was the entire ignition grounding point on this bike as per previous owner... not sure if that is how it was intended stock). I took a dremel tool to the bracket to make sure the terminal had a nice shiny grounding point, and put the bolt (not brand new, but clean) through it so it was bolted to the bracket very tightly. Ping from there to an engine case bolt, and it comes out like 23 ohms. It should be about .5 ohms (.2 of which comes from your test leads). I don't know how this is possible for a welded on tab, but I've learned on old dirt bikes that anything is possible and it's better to end run some problems then meddle in the affairs of wizards, so I just ran a ground strap to another good grounding point on the frame. Later I may run a ground strap direct from the frame to the engine as well, it's easy enough. So now I have to scare up a coil, and wait for the CDI to arrive. It will be interesting to see how different the bike runs with the correct CDI. Once that is sorted I can dial in the jetting. I also found a $2 Champion plug at the local auto parts store that is almost the same as the $6 NGK that KX-60 needs (a more expensive plug than the KDX uses). Probably not the plug I would want to use for real trail riding or for the last steps in dialing in jetting, but for diagnosing problems that are fouling plugs, they are 3x cheaper to ruin. :) Ahh the adventures of restoring old dirt bikes... :) [/QUOTE]
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Dirt Bike Discussions By Brand
Canadian Daves JustKDX
KDX spoiled me for two strokes, KX60 running badly
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