Rectifier resistor

freezerboy · 04-12-2021, 08:42 PM

I am replacing my X-PRO 5-Wire Voltage Regulator Rectifier.
The rectifier on the bike has this resistor on the green and red wires as pictured.
Do I need to add this resistor to my replacement unit?
Does anyone know why it was added to begin with?
None of the same exact rectifier replacements from any of the dealers have this addition.
Thanks

Megadan · 04-12-2021, 08:57 PM

I would reckon that is a diode. Never seen a diode on the hot and ground charge wires like that before, but there may be a circuit downstream that requires it.

TxTaoRider · 04-12-2021, 09:06 PM

Looks like a capacitor to me.

Mudflap · 04-12-2021, 09:07 PM

It's a capacitor. Does your bike have a battery? If not you will probably need the cap.

freezerboy · 04-12-2021, 09:10 PM

Thank you for the replies, yes my hawk has a battery. LOL
I only know enough electronic stuff to be dangerous

Megadan · 04-12-2021, 10:18 PM

Quote:

Originally Posted by freezerboy

I only know enough electronic stuff to be dangerous

You just described me lol.

gwowzer · 04-12-2021, 11:37 PM

That is most definitely a capacitor.
Capacitors are meant to temporarily store and then discharge electrons, either for a starting or "large electrical load" circuit, or for "electrical smoothing" purposes for sensitive electronics.
If it matters or not depends on where the harness it is attached to plugs in.
What circuit is it on, or where does that plug go?

Mudflap · 04-13-2021, 03:13 AM

The 3 yellow wires are AC from the stator. Red and green go to the battery. The battery itself will act as a capacitor but usually one is added to make the regulator work without a battery.

ChillRider · 04-13-2021, 04:18 AM

I imagined one would need a bigger capacitor to replace a battery's buffering/filtering function. Even a small radio drawing 10W tops would have a larger one in its power input stage (then again, a motorcycle's AC electrical system operates at a higher frequency than mains, so a smaller cap could also work OK).

However, in the place it is, it's probably smoothing out the power supply for a more sensitive piece of electronic equipment.

franque · 04-13-2021, 05:42 AM

You're partially correct, it would need a bigger capacitor, but the AC side of things is around 40V, so far below mains. I would remove the capacitor if it was me, there's no logical reason for it to be in the circuit. I don't think it's hurting anything, but I can't see any real reason for it.

04-12-2021, 08:57 PM	#2
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,032	I would reckon that is a diode. Never seen a diode on the hot and ground charge wires like that before, but there may be a circuit downstream that requires it. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
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04-12-2021, 09:06 PM	#3
TxTaoRider Join Date: Oct 2020 Location: Flower Mound Texas Posts: 904	Looks like a capacitor to me. __________________ 2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene"
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04-12-2021, 09:07 PM	#4
Mudflap Join Date: Sep 2014 Posts: 1,880	It's a capacitor. Does your bike have a battery? If not you will probably need the cap.
	0

04-12-2021, 09:10 PM	#5
freezerboy Join Date: Dec 2012 Posts: 24	Thank you for the replies, yes my hawk has a battery. LOL I only know enough electronic stuff to be dangerous
	0

04-12-2021, 11:37 PM	#7
gwowzer Join Date: Aug 2019 Location: Central Ohio Posts: 297	That is most definitely a capacitor. Capacitors are meant to temporarily store and then discharge electrons, either for a starting or "large electrical load" circuit, or for "electrical smoothing" purposes for sensitive electronics. If it matters or not depends on where the harness it is attached to plugs in. What circuit is it on, or where does that plug go?
	0

04-13-2021, 03:13 AM	#8
Mudflap Join Date: Sep 2014 Posts: 1,880	The 3 yellow wires are AC from the stator. Red and green go to the battery. The battery itself will act as a capacitor but usually one is added to make the regulator work without a battery.
	0

04-13-2021, 04:18 AM	#9
ChillRider Join Date: Jun 2020 Location: A small country with a funny name Posts: 164	I imagined one would need a bigger capacitor to replace a battery's buffering/filtering function. Even a small radio drawing 10W tops would have a larger one in its power input stage (then again, a motorcycle's AC electrical system operates at a higher frequency than mains, so a smaller cap could also work OK). However, in the place it is, it's probably smoothing out the power supply for a more sensitive piece of electronic equipment.
	0

04-13-2021, 05:42 AM	#10
franque Join Date: Nov 2017 Location: Marseille, France -> Conakry, Guinea Posts: 1,481	You're partially correct, it would need a bigger capacitor, but the AC side of things is around 40V, so far below mains. I would remove the capacitor if it was me, there's no logical reason for it to be in the circuit. I don't think it's hurting anything, but I can't see any real reason for it.
	1