SuzukiSavage.com - Stator may be hors de combat

Gyrobob

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Stator may be hors de combat
10/28/17 at 14:36:46

Based on what I have read in other charging system posts here, I am dismayed.

The main clue was that the battery was not being recharged. The bike died in traffic about a mile from home. I let it sit for 20 minutes, got it restarted and rode it back.

The voltmeter on the bike shows small random changes in voltage at different engine rpm. When a multimeter is connected to the battery, varying the rpm does not vary the voltage.

The three yellow wires connected to the stator give good news and bad news.
---- Good news: None are grounded, and there is continuity amongst all three.
---- Bad news: at 2000 rpm they each output about 26 volts. 4000 rpm, 49 volts. 5000 rpm 63 volts.

When doing a multimeter diode test, the rectifier shows .5volts one way and 0 volts the other on the red wire to the yellow stator wires, and then doing it again on the black wire with the white stripe.

So,... the stator voltage is consistent, increases with rpm, but does not get up to the 100VAC everyone here says is required. The rectifier diodes check out. I have no facts on the voltage regulator; I know of no way to test it.

Why would the stator behave normally except for it putting out ~63 volts instead of 100? In other experiences I have had with motorcycles and with aircraft, a stator just dies altogether. It is as if three equally spaced windings failed. One wonders.

Do any of you Savage Gurus have suggestions?
---- Unless I get some better understanding of what is going on here, it looks like I'll be replacing the stator. Not a quick/easy job.
---- Seems like ebay has stators ranging from $40 to $225.
---- Amazon's range from $40 to $240.
---- Gaskets will be around $20.

Please let me know if there is something dopey I missed, and can solve my problem.

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« Last Edit: 03/07/19 at 17:16:54 by Gyrobob »

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Stator may be hors de combat Reply #1 - 10/28/17 at 15:37:30 Magnets not up to snuff?
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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28848 Tucson Az Gender:	Re: Stator may be hors de combat Reply #2 - 10/28/17 at 15:58:30 Stator time... (don't forget,.. once you have the bolts out,... there's a giant magnetic pull on the case... You'll think you forgot a few bolts)... Beautiful bike...
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Stator may be hors de combat Reply #3 - 10/28/17 at 16:01:38 Pull the inspection plug first.
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batman Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 3806 osceola new york Gender:	Re: Stator may be hors de combat Reply #4 - 10/28/17 at 17:12:39 JOG , raised a point about the magnets. Have you ever had the rotor off? A sharp blow or dropping it can ruin the magnets.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Stator may be hors de combat Reply #5 - 10/28/17 at 18:57:21 I'm totally not a charging system troubleshooting guy. I'm just asking if that's a possibility. The symptoms seem to point to that.
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Gyrobob Serious Thumper Offline Posers ain't motorcyclists Posts: 2571 Newnan, GA Gender:	Re: Stator may be hors de combat Reply #6 - 10/29/17 at 12:58:05 Is there some procedure for checking the voltage regulator?
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Gyrobob

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Re: Stator may be hors de combat
Reply #7 - 10/29/17 at 13:15:42

Serowbot wrote on 10/28/17 at 15:58:30:

Stator time... (don't forget,.. once you have the bolts out,... there's a giant magnetic pull on the case... You'll think you forgot a few bolts)... Cool

Beautiful bike... Kiss

I have heard that,.... one guy used several strips of strapping tape making a loop/handle to pull outward on the case so he wouldn't risk gouging the case or dinging the gasket.

I wonder if the gasket is usually saved and reused, or does it always tear apart when that cover is taken off?

Thanks for the beautiful bike comment.

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Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28848 Tucson Az Gender:	Re: Stator may be hors de combat Reply #8 - 10/29/17 at 13:31:07 Mine tore while I was fighting the magnet... Best have a new one ready... it's not something you want to do over... Another tip... if you'll be removing the sidestand... insert washers or coins in the spring coils while the sidestand is extended, to make reinstall easy...
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Gyrobob Serious Thumper Offline Posers ain't motorcyclists Posts: 2571 Newnan, GA Gender:	Re: Stator may be hors de combat Reply #9 - 10/29/17 at 13:32:56 Serowbot wrote on 10/29/17 at 13:31:07: Mine tore while I was fighting the magnet... Best have a new one ready... it's not something you want to do over... I figured as much. I'll just order a new gasket when I order the stator, then. Thanks.
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Gary_in_NJ Serious Thumper Offline LS650 Cafe Racer Posts: 2633 Amongst the Twisty Roads	Re: Stator may be hors de combat Reply #10 - 10/29/17 at 18:28:29 Go with an OEM stator. I've heard both good and bad about aftermarket units, but the OEM stator always works.
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Gyrobob

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Re: Stator may be hors de combat
Reply #11 - 10/29/17 at 18:43:52

Gary_in_NJ wrote on 10/29/17 at 18:28:29:

Go with an OEM stator. I've heard both good and bad about aftermarket units, but the OEM stator always works.

"...the OEM stator always works." If it always worked I wouldn't be in this situation.

$225 vs $40. That's a huge diff. Not having to do it over again is a sensible thing to do.

crud!

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« Last Edit: 11/04/17 at 08:17:50 by Gyrobob »

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ohiomoto Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2784	Re: Stator may be hors de combat Reply #12 - 10/30/17 at 06:18:36 Pretty sure I still have a stator for sale.
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Gyrobob Serious Thumper Offline Posers ain't motorcyclists Posts: 2571 Newnan, GA Gender:	Re: Stator may be hors de combat Reply #13 - 10/30/17 at 06:38:43 Well, I'm pretty sure I'd like to know more about it.
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ohiomoto Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2784	Re: Stator may be hors de combat Reply #14 - 10/30/17 at 07:26:43 It's on a parts bike that came with my bike that had a cracked piston. I'll have to dig the lower end out and make sure I didn't sell it. My contact info is in here: http://suzukisavage.com/cgi-bin/YaBB.pl?num=1466172778
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