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07-17-2010, 1:38 PM montanacx Joined on 06-23-2010 bozeman mt Posts 9 conducted stator tests.. need help Okay bike has been running like crap. It pulls hard till 4500rpm then cuts out and sputters really bad all the way to 6500rpms, then somewhat comes out of it. You can very slowly pull through it some times by bairly giving the bike gas in these rpm ranges. Carbs have been deep cleaned a couple times and have just been rebuilt... Also I tried changing jetting and nothing has helped at all.. So today i did i stator test that i fould on this site and i am going to post results and would like to hear what everyone thinks. All test where done on the connector under the seat. white to blue wire= 73 ohms gree to white whire= 306 ohms orange to green= 111 ohms orange/red to green= 97ohms light blue/red to green 97ohms blue to green @2000rpms =67v and 35v @5000rpms white to green@2000rpms =34v and 8v @5000rpms THANKS FOR ANY AND ALL HELP GUYS 1981 cx500    Report

07-18-2010, 6:09 AM SamsGL650I Joined on 05-30-2010 Annville, PA Posts 93 Re: conducted stator tests.. need help Not as familiar with the CX as mine is a GL650. Someone will chime in soon with the stator test info. Montano--check this (if applicable to your CX) The accelerator pump, check the diaphragm, not deterirated? Just a thought... 1983 Honda GL650I Kawasaki EN500LTD 1st Bike: @1974 Honda CL 175    Report

07-18-2010, 8:39 AM makindu Joined on 06-27-2009 Eau Claire, WI 54703 Posts 71 Re: conducted stator tests.. need help Ideally, blue to white wire resistance should be in the range of 77-95 ohms, and white to green (ground) wire resistance should be in the range of 387-473 ohms. Both your readings are out of range on the low side. Generally, not a good sign. However, I never place too much emphasis on static resistance readings alone. The real proof in the pudding is what these hi and lo coils are putting out in the form of AC voltage, at normal riding rpms (5000). The blue wire should produce 90-100 VAC with a healthy winding, the white wire should produce 80-90 VAC. When you increased your rpms from 2000 to 5000, both of your VAC output readings should have gone up. It would appear from your numbers/data that one or both of those windings (hi/lo) are on their way out. Try the blue wire fix found elsewhere on this site. Essentially, on the non-stator side of the connector, you remove the blue wire (hi speed winding)from the connector and physically splice it to the white wire (lo speed winding). If the bike runs better at the higher rpms, you have now confirmed that the hi speed winding is failing, and stator rewinding or replacement is imminent. 1982 Honda GL500 Silverwing 1982 Yamaha 550 Vision    Report

07-18-2010, 9:31 AM montanacx Joined on 06-23-2010 bozeman mt Posts 9 Re: conducted stator tests.. need help okay thanks guys i was pretty sure that the low output readings where a good sign that it was dieing but just had to confirm this.. thanks for all the help once again 1981 cx500    Report

07-18-2010, 10:57 AM Reg in Bristol Joined on 03-11-2006 Bristol UK Posts 782 Re: conducted stator tests.. need help I always assumed that 100ACV figure was done open circuit during cranking I never bothered with it when I had a CDI bike   Your resistance  readings are a  bit on low side and the stator may be on the way out for all I know It is a comon weak spot on CDI bikes and shared experience makes us suspect that (It occurs to me that a graph or chart of in circuit voltages on a good working bike could be  useful comparision guide for CDI owners though) I don' need no stinking CDI as my rats a TI bike but just for the hell of it I did a  test on my lads 81 CDI bike which I have here as hes gone off and joined the Royal Navy Blue/white connector tests White to ground 296 ohms Blue to white 70 ohms Open circuit voltages whilst cranking using Fluke Autoranging Digital meter set to read ACV Blue to ground 78 White to ground 62 In circuit voltages using Fluke Auto ranging Digital meter set to read ACV Blue to ground 80vac at tickover 51VAC at 5 thou white to ground 54VAC at tickover 8VAC at 5 thou None of the above meets the usual criteria we hear about CDI tests but as far as I know, the bikes been running well and my son never reported any problems to me about it. Its possible its in the early stages of failure though. I cant road test it myself as its not road taxed at the mo' It starts easily and revs to redline Ok. Another thing, those voltages whilst AC in origin are being rectifed/clipped by the CDI box when the connectors are joined up so what we're trying to read is a series of pulses not an AC waveform as theres no longer any negative going voltages. Having said that, few of us have access to oscilloscopes so we have to rely on rule of thumb or rough and ready methods of testing to give us a fair idea of whats going on. Thats where data from a few people supplying readings from good working bikes would help to build a map of guideline figures. The 'Mongrel' is on the road 78 frame, ZAB gubbins, 82 'TI' motor, Suzuki clocks, MZ screen and gaiters, Kawasaki master cylinder, BMW horns DIY wiring and all thrown together with a fanatical inattention to detail :-)    Report

07-18-2010, 2:37 PM makindu Joined on 06-27-2009 Eau Claire, WI 54703 Posts 71 Re: conducted stator tests.. need help My VAC readings were for the raw stator output voltages (connector unplugged) and were taken from a stator trouble-shooting FLOWCHART that I can no longer find (I think that it is found in the factory manual), but it must still exist somewhere here. I am in 100% agreement with Reg in Bristol. More often than not, we're comparing apples and oranges with the voltages being measured and compared. Excellent point on whether AC readings were taken with a digital multimeter or an oscilloscope, and whether downstream circuitry was plugged in or not. Definately need 'typical readings' taken from working bikes with everything plugged in as it should be. 1982 Honda GL500 Silverwing 1982 Yamaha 550 Vision    Report

07-19-2010, 6:25 AM Reg in Bristol Joined on 03-11-2006 Bristol UK Posts 782 Re: conducted stator tests.. need help Makindu Yep, precisiely Tests under load are far more useful than open circuit tests thats why I never bothered with those stator voltage tests previously.. You hold a coil of wire in the air and whip a magnet past it and youll get a voltage make it do some work and you'll get nothing. Stator resistance tests may vary due to the way the stator was built and wound, espcially in aftermarket or rewound stators. Ultimately it comes down to  how much work can it do by providing power to the CDI A map of 'working' AC voltages taken from good running bikes should be easy to gather as digital meters are commonplace and could provide useful benchmarks for others to compare theirs to. We know it isnt really AC were reading but  hopefully a better rule of thumb to diagnose stator health .   The 'Mongrel' is on the road 78 frame, ZAB gubbins, 82 'TI' motor, Suzuki clocks, MZ screen and gaiters, Kawasaki master cylinder, BMW horns DIY wiring and all thrown together with a fanatical inattention to detail :-)    Report

07-19-2010, 3:09 PM Abes_CW Joined on 04-17-2007 saskatoon Posts 3,036 Re: conducted stator tests.. need help I've found this flow chart useful in the past http://www.rmstator.com/PDF/fault_finding.pdf 1983 GL650i Had 4 CX/GL's at one point this year, down to one, next spring is another adventure! age 38 (29 plus tax)    Report

07-19-2010, 4:52 PM makindu Joined on 06-27-2009 Eau Claire, WI 54703 Posts 71 Re: conducted stator tests.. need help Yup, thats the one I was thinking of... Just didn't have it bookmarked. For anyone handy with a multimeter, its a very useful flowchart. http://www.rmstator.com/PDF/fault_finding.pdf 1982 Honda GL500 Silverwing 1982 Yamaha 550 Vision    Report

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