Honda CG 125 Charging Issues, Part 2

[rpsmith79]

I have decided to start a new thread on this as the last one went off track a little (thanks Tef )

A bit of a back story, went out on CG a month or so back, conked out, no juice in the battery to restart it, got it home, charged battery, fired up fine, checked voltage, key off 12.5V, engine running 11.5V, ended up changing the Reg/Rec and got a healthy 13.5V when running.......... happy days

Jump to today, took it out for a quick country lane blast after work, all going well when save thing happened, started to conk out, no power, stalled when clutch pulled in, pulled over, no juice again, barely even enough to light up the neutral light

So, pushed it home (luckily all down hill), put on charge for 10 mins, fired up fine, and back down to 11.5V again............. fuck

So it appears i have somehow fucked up my Reg/Rec again.............. how is this possible?

TL:DR Bike not charging, replaced Reg/Rec and all was good, now not charging again, suspect Reg/Rec gone again

Any ideas what can cause the Reg/Rec to just go like that, or is there somewhere else i should be looking for potential problems

[Fazer Tom]

Probably just a shitty reg, stick another one on. If all the wiring checks out id just put it down to that.

just bad luck that you've had 2 go.
____________________
(CBT 01/07/11. Theory, 21/05/12. MOD 1, 01/06/12. MOD 2, 3/08/12)

Past: (1981 CG125) (1992 ZZR250 x2) (1976 KZ400) (1993 400 Superfour) (2002 Triumph TT600) (1998 Fazer) (2001 CCM 636) (2000 CCM 604) (2007 Kawasaki Z750) (2005 Husqvarna SM450R) Current: (1989 Bandit 400)

[rpsmith79]

[fast wooly]

Looking at the wiring diagram it looks like a single phase reg/rectifier so you should be able to pick a generic one up off ebay for around £20,if you need any help wiring it let me know.

Wooly

[rpsmith79]

This is the wiring for my CG 125 ES4, i believe they differ some from from the earlier ones

Looks like a 3 phase rectifier to me, but i'm not great with electrics

[rpsmith79]

Just found another 2nd hand one on eBay for a tenner, think i'll take a punt on that, and if that only lasts a month then i surely have something else wrong

[WD Forte]

Looks like a common 3 phase RR to me, as found on many's a bike
so there are thousands to choose from

£130 for a new one? WTF?

Why your previous one failed is mystery at the mo
They're normally quite reliable.
I'd get one from say a 500cc+ bike
as it would probably be rated for a higher output than a
125 bikes stock RR

I stuck a CX500 one on my lads Yamaha Majesty 125 and
it worked a treat
____________________
bikers smell of wee

[rpsmith79]

[rpsmith79]

After a bit more digging, it appears i need a 3 phase, 5 wire Reg/Rec (3 wires from stator, +12V & 0V)

There seems to be plenty of universal 3 phase 6 wire Reg/Recs, with a 6th black wire, which as i understand is a "DC Voltage Sense" wire, which should be connected to the ignition switch

Can i get away with fitting a 3 phase 6 wire reg/rec and just ignore the "DC Voltage Sense" wire, or do i need to do a bit more wiring work and attach it to the ignition switch

Any advice much appreciated as i am out of my depth when it comes to electrickery

[WD Forte]

[rpsmith79]

Cheers Forte, makes a bit more sense now