Cb500 electrics issue

open · Trackday Trickster Joined: 04 Apr 2011 Karma :

So the issue I have is that my CB500 battery isnt charging.

Happenned first s couple weeks ag, after using the bike went to start it up and it just couldn't tick over. Bump started it, used it like that for two days and it resolved itself and was normal.

Was ok for a week, but now it is not charging again, so can ride for an hour and turn.off and it won't start. Also when using indicators they flash like crazy. Been push starting it when need to use it but aint touched it for a week.

What do you think is t he problem. Could ut be the reg/rec?
I dont have the equip to test anything.[/quote]
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"Calamity - A more than commonly plain & unmistakable reminder that the affairs of this life are not of our own ordering."

[s]Baotian BT49qt-9 --> Honda CG125 (4 speed) '51 plate ----- 03/11/2012 Mod 2 PASSED! --> Cb500s[/s] Revoked Sad

KymcoRatChop · Nova Slayer Joined: 07 Nov 2013 Karma :

KymcoRatChop · Nova Slayer Joined: 07 Nov 2013 Karma :

Just to back up my theory of reg/rec.

Definitely not charging?

Indicators get faster or slower when you rev up?

Headlight get dimmer when you rev up?

KymcoRatChop · Nova Slayer Joined: 07 Nov 2013 Karma :

Sorry - just re-read the post and see you don't have the ability to test.

Head over to Maplins and buy this;

https://www.maplin.co.uk/domestic-multimeter-37279

It WILL save you so much hastle and it will help you advise others about your problem better Smile

open · Trackday Trickster Joined: 04 Apr 2011 Karma :

Just a quick stupid question, where is the reg/rec on the CB500?
____________________
"Calamity - A more than commonly plain & unmistakable reminder that the affairs of this life are not of our own ordering."

[s]Baotian BT49qt-9 --> Honda CG125 (4 speed) '51 plate ----- 03/11/2012 Mod 2 PASSED! --> Cb500s[/s] Revoked Sad

open · Trackday Trickster Joined: 04 Apr 2011 Karma :

Just a quick stupid question, where is the reg/rec on the CB500?
____________________
"Calamity - A more than commonly plain & unmistakable reminder that the affairs of this life are not of our own ordering."

[s]Baotian BT49qt-9 --> Honda CG125 (4 speed) '51 plate ----- 03/11/2012 Mod 2 PASSED! --> Cb500s[/s] Revoked Sad

Fizzer Thou · World Chat Champion Joined: 06 Aug 2011 Karma :

The rectifier/regulator will normally be situated somewhere where the airflow will be useful for dissipating the heat given off by the unit.

On a friends Triumph TT600 the unit was behind a seat sidepanel.This was probably why it overheated and the connectors became contaminated.

Edit. If you had the manual it would make working on the bike a lot easier.

https://www.amazon.co.uk/Honda-CBF500-Service-Repair-Manual/dp/1844257703
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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

open · Trackday Trickster Joined: 04 Apr 2011 Karma :

Cool gonna have a look and let you know how it goes
____________________
"Calamity - A more than commonly plain & unmistakable reminder that the affairs of this life are not of our own ordering."

[s]Baotian BT49qt-9 --> Honda CG125 (4 speed) '51 plate ----- 03/11/2012 Mod 2 PASSED! --> Cb500s[/s] Revoked Sad

open · Trackday Trickster Joined: 04 Apr 2011 Karma :

Bloody Bike!

Problem is I can't start the bleeding thing to get it back home. Been sat for a week and a half, and was struggling to bump start it. Uhh.

Gonna try again tomorrow, but any tips?
I heard jumping on the bike but I'm short and bike is heavy lol
____________________
"Calamity - A more than commonly plain & unmistakable reminder that the affairs of this life are not of our own ordering."

[s]Baotian BT49qt-9 --> Honda CG125 (4 speed) '51 plate ----- 03/11/2012 Mod 2 PASSED! --> Cb500s[/s] Revoked Sad

Islander · World Chat Champion Joined: 05 Aug 2012 Karma :

Buy a multimeter. You can't diagnose electrical and charging issues properly without one.

Vincent · Banned Joined: 16 Oct 2006 Karma :

jjdugen · World Chat Champion Joined: 03 Jun 2011 Karma :

The increase in flasher speed points to a Reg/Rec that has gone short curcuit, i.e. its allowing the AC from your alternator into your wiring loom, and, all the things connected. AC will:- Fry your ECU. Fry your battery. Usually start to blow bulbs. Screw up any electronic speedo / rev counter unit.
Your best bet is to buy a new battery, fully charge it, disconnect the Reg/Rec at its plug, and ride the bike home. Then you can do your electrical tests taking care not to rev the bike too highly when checking the voltage output.
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KymcoRatChop · Nova Slayer Joined: 07 Nov 2013 Karma :

open · Trackday Trickster Joined: 04 Apr 2011 Karma :

Thanks guys some top advice. I managed to bump start it home during lunch...And I was revving the bollocks off it the whole time to stop stop it cutting out Embarassed

I think the fact that it wasnt pissing it down today helped stop the wheel slipping during start.

I have not got round to testing it w/ multimeter yet.
So now that I have it at home do you suggest replacing battery first before testing?

Also I have seen some cheap reg/recs on eBay - Not looking to trust them but would this do:

https://www.ebay.co.uk/itm/For-Honda-CB-500-CB500-R-T-V-W-X-Y-1993-2001-Japanese-Regulator-Rectifier-/150910667887?pt=UK_Motorcycle_Parts_13&hash=item2322fa0c6f
____________________
"Calamity - A more than commonly plain & unmistakable reminder that the affairs of this life are not of our own ordering."

[s]Baotian BT49qt-9 --> Honda CG125 (4 speed) '51 plate ----- 03/11/2012 Mod 2 PASSED! --> Cb500s[/s] Revoked Sad

KymcoRatChop · Nova Slayer Joined: 07 Nov 2013 Karma :

open · Trackday Trickster Joined: 04 Apr 2011 Karma :

Sorry to revive thread - but can someone confirm that the reg/rec I linked to above is decent enough to get. If not please link to one I can buy today.

Real lazy with getting it sorted out yet and the cold weather hasn't motivated me much.

Thanks!

EDIT: Reg/Rec replacement sorted it
____________________
"Calamity - A more than commonly plain & unmistakable reminder that the affairs of this life are not of our own ordering."

[s]Baotian BT49qt-9 --> Honda CG125 (4 speed) '51 plate ----- 03/11/2012 Mod 2 PASSED! --> Cb500s[/s] Revoked Sad

The Shaggy D.A. · Super Spammer Joined: 12 Sep 2008 Karma :

Looks better than the chinkee one I put on my CB500.
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Currently : Royal Enfield 350 Meteor
Previously : CB100N > CB250RS > XJ900F > GT550 > GPZ750R/1000RX > AJS M16 > R100RT > Bullet 500 > CB500 > LS650P > Bullet Electra X & YBR125 > Bullet 350 "Superstar" & YBR125 Custom > Royal Enfield Classic 500 Despatch Limited Edition (28 of 200) & CB Two-Fifty Nighthawk > ER5

Vincent · Banned Joined: 16 Oct 2006 Karma :

Should be fine yeah.
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Cyclingbiker · Spanner Monkey Joined: 05 Aug 2012 Karma :

I had the same issue with the Reg/Rec on my CB500 when I bought it 3 months ago, the battery wasn't getting charged and was depleting itself when the main headlight was turned on. The rectifier was surely fried and needed replacing.

https://www.bikechatforums.com/viewtopic.php?p=3705184&highlight=#3705184

I bought a MOSFET type rectifier from off of an S1000RR from some breakers in Germany, found them doing a search on eBay. The rectifier is made Shindengen and has the model code FH020AA. Basically these are the rectifiers to buy if you want reliability, the Shunt-type OEM ones on Hondas and many other bikes are notoriously unreliable and fail after a period of time.

You can buy a kit from the States to replace yours and comes with some crimp connectors (buy a good crimper tool Exclamation

) to replace the connector block that your old rectifier uses.

https://www.ebay.co.uk/itm/YAMAHA-SHINDENGEN-FH020AA-REGULATOR-W-CONNECTORS-REPLACES-FH012AA-/380705241034?pt=Motorcycles_Parts_Accessories&hash=item58a3ccf7ca

Or you could search for rectifiers from bikes that have Shindengen ones fitted as standard. These included the later 07- R1's, S1000RR and CBR1000RR/CBR600RR from the past few years. Double check before purchase to make sure you get the correct model of rectifier. You can use spade connectors to make the connection or you can do what I did (for the input at least) and use 1/2 of this triumph link lead which has the necessary waterproof connector block already attached. For the battery output I just used the spades I freed from the old connector block and put them straight onto the output terminals.

This mod has proven to be totally reliable so far and I have had no troubles with my electricity supply. The only trouble I had was getting the much larger rectifier to fit under the side panel, it did go in but at and odd angle and with only one bolt holding it in place and I did have to angle grind off the old hanger for the cable block to make the entire area flat with not obstruction for the connector blocks.
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Honda CB500s (1999) - Honda CG 125 BR-J (1991)

Mod 1 - Passed - 12/11/12 --- Mod 2 - Passed - 26/11/12