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July 24th, 2017, 01:10 PM   #1
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I Ride: Husaberg FE600 1994, Yamaha FZS1000, Beta Tr33
1994 voltage regulator qustions

I have a 1994 FE600 without battery, electric starter etc.

There is one yellow wire from the stator which connects to the yellow wire on the regulator. The regulator is a small cube with just a yellow and a black (frame ground) wire.

I get about 17 volts AC out of this without load.

1. Is this just a regulator with no rectifier?

2. Is 17 volts without load to much? Will it fry my front and rear lights? Or will the voltage drop when I load the regulator?
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July 24th, 2017, 01:37 PM   #2
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Are you mesuring in AC ? Since you don't have a rectifier you should measure in AC
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July 24th, 2017, 02:56 PM   #3
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Yes - as I wrote, 17 volts AC with no load.
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July 24th, 2017, 10:00 PM   #4
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Check and clean ground connection to the regulator . If it does not go much higher the bulbs should hold up
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July 25th, 2017, 03:16 AM   #5
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Hi

Yes it's AC because this regulator has one internal full bridge rectifier.

Your voltage it's a bit high, it should be around 14 V, but on the other hand no problem with 17V, as long as it stays there.

It can be considered normal because the internal zener opens at +5V then the 12V.

As webmonster said, check ground, it can help keeping it down.


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July 25th, 2017, 04:59 AM   #6
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Thanks for this info! Useful for me in trying to understand bike electrics in general.

We could maybe grab a higher-voltage bulb for testing to see where the voltage drops when we load it? Probably even a 240V bulb, maybe with a resistor if we want to make the load identical to know for sure.
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July 25th, 2017, 12:08 PM   #7
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Tested under load today. It has about 12 volts on low idle (as low as the engine almost stalls). At normal idle it reads 17-18 volts. When revving the engine Inhadcat least 40 volts on the multimeter but I have no hold/track maximum function so it might have been even higher. So I guess this regulator is toast.

Do I go for a original replacement or aftermarket/generic?

If aftermarket, how do I connect? I only have the one wire from the stator? I guess the other side of the stator coil is connected to ground? So it's not possible to fit a regulator with rectifier without breaking the stator coil ground connection or possibly skip chassi ground for the DC side and use ground feed from rectifier to all accessories.

I don't need a rectifier but I can't seem to find any generic regulators without rectifier.
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July 25th, 2017, 12:11 PM   #8
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Any 12v ac system should work . Yamaha blaster . Works the same type .
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July 26th, 2017, 12:52 AM   #9
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Hi

You can use a generic regulator.

It must be a single phase one.

Here you have one example
HPI | Horse Power Ignition


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