Houston we have a problem - Charge Indicator OFF - VTXOA
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post #1 of 12 (permalink) Old 05-09-2019, 07:07 PM Thread Starter
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Houston we have a problem - Charge Indicator OFF

It happened the other day, my Led charge indicator went off.
A few hours later I checked connectors, they looked good.
Then I checked stator voltage it was good, 17 AC volts on each phase at idle.
DC charging voltage was 14.4 VDC.

Today I had a good voltage indicator on my LED charge indicator for the first 7 miles.
Then I noticed it was off. Headed back to the house.
Having a LED headlight is nice with the low current draw.
Not charging at the battery. No voltage from the Stator.

It looks like charred insulation on the stator and charred wiring that splices to the stator.
Looks like something that a "shorting" rectifier/regulator would do...
104k miles and now at 190,763 miles.

The same stator when installed new in 2011.
Attached Images
File Type: jpg stator close-up20190509_175820.jpg (311.3 KB, 14 views)
File Type: jpg stator wiring20190509_181638.jpg (312.5 KB, 17 views)
File Type: jpg stator cover20190509_175708.jpg (301.7 KB, 15 views)
File Type: jpg stator-flywheel20190509_175737.jpg (287.5 KB, 13 views)
File Type: jpg DSC05406 2011 stator.JPG (879.3 KB, 14 views)
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2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 190,260 VTX miles

Last edited by Hans&Feet; 05-09-2019 at 07:33 PM.
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post #2 of 12 (permalink) Old 05-09-2019, 11:05 PM
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Sorry for your electrical issues.... good thing you were near home..
.
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2005 VTX1800 F, type II, Silver Tribal, 86,000 Miles, Purchased Feb, 2005.
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post #3 of 12 (permalink) Old 05-10-2019, 10:23 AM
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Hans,


You are the trail blazer when it comes to probable preventive replacement parts at given mileages.



I replaced my rectifier/regulator at 100K since you had trouble at about that many miles. I have a few to go before 190K. However, I will be keeping that number in my mind for another rectifier/regulator, plus probably a stator replacement.


Back before I hit the 100,000 mark you shared with me the few parts you had fail or give you trouble up to that point. I appreciated the info. I took care of them all before failure. You saved me a lot of trouble out on the road far, far from home and in some cases far from civilization.



Keep us up to date on any new issues as our X's age along with us.



Thank you.

My VTX as used on Race Tech site.I'm70 rode 07 Black Cherry VTX 1300R to 49 States+DC & 11 Provinces, 138,000mi+Yamaha RSV,37,000mi,both w/aux tank & Race Tech SuspensionIBA:Mile Eater Bronze &Silver,SS3000,3xSS2000,EclipseSS1000Gold, 19SS1000,6xBB1500,3TX1000,NPT 29/76; Lake Superior Circle Tour 15 to 20K per yr between the two MCs
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post #4 of 12 (permalink) Old 05-10-2019, 01:44 PM
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Sorry to see this happen to you.

Thanks for posting as you tackle this.
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post #5 of 12 (permalink) Old 05-10-2019, 06:53 PM Thread Starter
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I have ordered the Shindengen SH775 R/R which is a series regulator, it will reduce stator current flow to regulate the battery voltage.

The OEM and the Mosfet unit I had "Shorted" the stator output to control battery voltage.

I ordered a Ricks Motorsport stator.
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2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 190,260 VTX miles

Last edited by Hans&Feet; 05-10-2019 at 09:49 PM.
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post #6 of 12 (permalink) Old 05-10-2019, 08:05 PM
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Question

Quote:
Originally Posted by Hans&Feet View Post

Mosfet unit I had "Shorted" the stator output to control battery voltage.

.
This latest unit was a mosfet as well?

And the first time was the original?

I may do an upgrade before it happens to me.
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post #7 of 12 (permalink) Old 05-10-2019, 08:55 PM
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Thanks for posting Hans and keeping us informed about your replacement choices. Great info which is helpful for the rest of us.

2007 - 1300c - Red - 24,000 miles - Mustang Seats - Cobra Boards - Pair Valve Mod.​
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post #8 of 12 (permalink) Old 05-10-2019, 08:59 PM Thread Starter
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OEM - Standard transistors and diodes have .7 voltage drop, they generate heat.

MOSFET was the second R/R.
I measured as much as 22 AC amps on a stator leg with the MOSFET.
MOSFET has very low resistance when turned On, minimal heat but it throws a bigger short on the stator which has to absorb the heat.

New series unit probably uses a digital signal to control ON time for charging voltage control.

If you ever put a DMM on the stator leads with a shunting/shorting, the voltage is bouncing.
Many times in single digit voltage range, shunting/shorting for milliseconds.

My "Charge Indicator" is a resistor, a Yellow Led, and a 12v zener diode.
It turns on at about 13.5 volts. It is a low cost voltage monitor.

One person omitted the resistor and I was baffled that the led did not go up in smoke.
Further discussion - found out he used a green Led which is good to about 4 volts + 12v zener = 16 volts
That means 2 components can work.
Attached Images
File Type: jpg DSC05952.JPG (859.1 KB, 2 views)
File Type: jpg LCVM GPS power socket05521.jpg (245.6 KB, 4 views)

2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 190,260 VTX miles

Last edited by Hans&Feet; 05-10-2019 at 10:23 PM.
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post #9 of 12 (permalink) Old Today, 09:51 AM Thread Starter
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The Stator and R/R arrived yesterday.

The Stator was incomplete.
The 3 phase coil ends were not connected to the three 16" - 20" of wire that go up to the connector.
A call to Rick's, an email with a picture, they will ship another one.
Looks like epoxy coating on the new stator.

The new R/R was briefly tested one phase at a time with a battery connected.
I had a 12v lamp as a series resistor/visual indicator on the stator side.
Initially bright the lamp dimmed as the battery got to full charge at 14.4 volts.
I like this.
Attached Images
File Type: png RicksMotorsportElectrics good - new with missing wires.png (255.0 KB, 8 views)

2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 190,260 VTX miles

Last edited by Hans&Feet; Today at 09:53 AM.
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post #10 of 12 (permalink) Old Today, 06:42 PM
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Quote:
Originally Posted by Hans&Feet View Post
My "Charge Indicator" is a resistor, a Yellow Led, and a 12v zener diode.
It turns on at about 13.5 volts. It is a low cost voltage monitor.
Nice.
I am thinking about adding a no-charge indicator to my VTX. Not a charge indicator. The opposite. No-charge. I'll probably get a yellow light with the lightning-bolt symbol and drive it via a 13V Zener. I don't want a light in my face when riding. I want it to be a warning light.

Been needing the kick in the pants to start on my "remote indicator panel" for a while. Might be the right time!
Thanks for the kick.

VTX 1800C
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