The maggot is running for poop when warm...

[makenzie71]

Honda CX500 is the machine.

Well I have one problem linked to my stator.  The bike runs fine cold.  After she's sufficiently warmed up she bogs down between 4000rpm and 5000rpm.  If I run one gear up to the 4k mark, then shift down to the lower gear to clear that 5k hurdle, she still pulls up top, though sluggishly.  After she's warmed up she's touchy all across the board...everytime I open the throttle she bogs.

The stator is a real common problem on this bike but if anyone else could direct me toward other ideas I'd appreciate it!

[trumpetguy]

What would make you think this problem is electrical?  Sounds like a fuel problem to me -- what do the plugs look like?

[makenzie71]

Part of it is the stator, or that's the assumption because of the 4k~5k hurdle.  This is very characteristic of the stator problem and the stator problem is very characteristic of the bike.  Be it, though, there is no sure-fire way to test it.

The plugs look good, though a bit sooty...when the "glitch" comes up it causes a severe misfire.  It could be fuel, but I've exhausted all my fuel issue leads.  Only thing left is balancing the carburetors but an imbalance there isn't really something that causes this particular running issue I don't think.

[trumpetguy]

Is the choke fully disengaged when warm?

I don't understand how the stator could cause a problem in a single narrow rpm range.  Do you know the mechanics of that issue?

One of my internet Datsun friends has a saying, "If you think it's fuel, it's electrical."  Sometimes the reverse is true as well!

[bombadillo]

choke sticking or rich is my guess.

[ben2go]

Have you checked all of the electrical connections?Bad grounds can cause some vierd things.Especially battery grounds and ignition grounds.

[yamahonkawazuki]

and this is a stupid question, BUT have you cleaned the carbs, or if so , recently?

[makenzie71]

This has been a constant issue, though varying in severity from time to time, since I got the bike running.  Right after getting it I had to thoroughly clean and rebuild the carburetors.  There is no choke cable has been removed and it's operated by hand on the carbs now...I can feel the slide return to the proper position.

It just now dawned on me that I had an elaborate ground harness built before and after swapping frames I did no re-install it.  That will help.

The narrow range of effect by the failing stator happens because it has two coils...a high and a low.  The transition from low to high is disrupted when the low coil starts giving out (it's almost always the low coil).

[sledge]

Your stator is shagged, could have duff coils too, both common faults on the maggot. You could try the famous CX "white-wire" fix as a short term measure. The Honda engineers were sniffing glue the day they came up with the CX ignition system design.

see here for a static test procedure and an explaination of the white-wire fix.
  http://www.elsham.pwp.blueyonder.co.uk/cx500/stator/

[spc]

^^ and that's why we keep sledge around, he's chock full of obscure yet strangely useful advice.

[makenzie71]

Well now it's totally shot...I know the common issues connected to the stator, but I haven't ever read anything about running temp being connected.  Today, though, it's a constant problem.  Needs new stator.