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Old 08-10-2009, 12:10 PM   #1
Shinglejohn
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Default CB 650 charging woes continue

My 81 CB650 isnt charging, once again.

It put a new rotor on it, as well as an R/R. Both aftermarket. It worked beautifully for about 3 months. Now all of a sudden no more charging. Its putting out about 12.4v at 5000.

the new rotor is showing no resistence between the copper rings. The brushes are damn near new as well and are making good contact.

The bike seems to be running into this problem when it gets hot, rides over 50 miles or so. Could this be causing a short?
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Old 08-10-2009, 12:49 PM   #2
seruzawa
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Might be a crappy rotor. Sounds like it is shorted. Low quality wire that isn't coated properly... incompetent winding where the wires get nicked... poor construction... who knows? Rotor should have several ohms. Is your ohmmeter accurate?

Dang, man. You ARE persistent. I'd have given up by now and found another bike. I'm not getting sucked in again like I did on a Magna. It seems like the bike is almost good.... will only take a couple hundred more bucks.. again... and again... and again....
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Old 08-10-2009, 01:17 PM   #3
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Yeah, i want to throw the damn thing into the lake. It worked great for the past four months... I almost started liking the bike.

upon firther inspection, i did find a nicked wire on the stator. Would this have caused my rotor to short? My ohmmeter is accurate(fairly anyway), it is showing no reading between the rings. But i tested it on other known working parts, it reads properly.
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Old 08-10-2009, 01:25 PM   #4
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If there's no resistance between the windings then you have a short in there. Time for the ol' match in the gas tank weenie roast and a newer bike.
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Old 08-10-2009, 01:27 PM   #5
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Quote:
Originally Posted by Shinglejohn View Post
Yeah, i want to throw the damn thing into the lake. It worked great for the past four months... I almost started liking the bike.

upon firther inspection, i did find a nicked wire on the stator. Would this have caused my rotor to short? My ohmmeter is accurate(fairly anyway), it is showing no reading between the rings. But i tested it on other known working parts, it reads properly.
It could. If it's in an easily repairable spot; I'd re-solder it, paint the whole thing again with varnish (or some of that insulating paint that's available in spraycans - look here for an example: Varnish,Insulating,Red - Rubberized Coatings & Industrial Varnish - Paints - Janitorial & Painting : Grainger Industrial Supply ), double-check the resistance again on all the phases - and if it checks OK - reassemble and ride it.

Or change the stator again, being sure to triple-check for the same problems.
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Old 08-10-2009, 01:41 PM   #6
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If there's one nicked wire there are likely to be more. I'd avoid this aftermarket company like the plague.

Google around. I'm pretty sure there's a place that rewinds these things and does a good job.
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Old 08-10-2009, 01:57 PM   #7
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There's a company in CO I used for the old Connie. I'll see if I can dig up their name. However, googling motorcycle electric repair seemed to find them. Estes, CO is the city and state.
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Old 08-10-2009, 02:08 PM   #8
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I've successfully used these guys: RM Stator - Stator, High Performance CDI Box, Regulator Rectifier, High Output Generator, Yamaha Stator, Honda Stator, Stator Repair, Arctic cat ZR stator, Arctic cat thundercat stator, Ski-doo stator repair,Yamaha Warrior stator,Yamaha Grizzly stato
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