Blackbird - runded outta electricities

[mudcow007]

So riding home on Friday an my new (to me) bike died.

Dead battery, stupidly its got a voltage light thing on the dash/ cluster which shows voltage levels (red, amber and green) which i had been ignoring

Got the bike home with a jump start, when I got the bike back battery was showing 11.8v left it over night on my optimate. just so there is a healthy voltage on the battery

The bike had a new reg/ rec earlier this year an it came with a new spare. Speaking to the previous owner he reckons it the genny/ alternator (which he has offered to go half's on - which is damn decent of him I reckon). The genny was replaced last year as well.

I have left the bike with him as I don't have the time at the moment to strip all fairings off etc.

why do Honda's always have issues with electricals!?!?!?

[Fisty]

[RhynoCZ]

The only issue with Honda motorcycles is the reg/rec unit and the stator. The rest of the electric stuff is bulletproof, unlike Italian bikes (for instance), that are mess all over the place.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[Pete.]

[RhynoCZ]

That's only one model.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[stinkwheel]

Why don't you test the windings with a multimeter before stripping half the bike apart and blowing your wad on possibly unecessary work?

If the alternator was replaced last year, it's vanishingly unlikely it's gone again unless whoever fitted it fucked it up.

Reg recs do go. So when you've tested the alternator and found it's perfectly ok, blow your wad on a mosfet reg/rec instead.
https://www.electrexworld.co.uk/cgi-bin/sh000001.pl?WD=cbr1100xx&PN=RR690-Honda-VTR1000-CBR1100XX-VTX1800C-%2ehtml#SID=1031?a1_21RR690

Alternator test in brief:

Unplug reg/rec. Set meter to resistance. Measure the following on the connector block that's connected to the bike.

Equal, reasonably low resistance between any pair of yellows. Open circuit (infinity resistance) between any yellow and the green.

Meter on volts DC: Battery voltage between red and green all the time. Battery voltage between green and black with ignition on only.

Dynamic test with meter on volts AC and engine running (caution, you could get a dunt if you get your fingers in the way). Roughly the same voltage, increasing with rev speed between any pair of yellows. Can be as high as 70v but it's a roughly equal output we're looking for here.

If all that checks out, your alternator is fine.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[mudcow007]

Slight update, he has pulled it to bits an has found continuity between 3 wires and earth on stator

continuity between 1-2 2-3 3-1 to earth?

He reckons they should be all open circuit, so looks like the stator windings, although with the bike running its showing 30v

[stinkwheel]

There shouldn't be continuity between any of the stator wires and earth. That should be a fully open circuit.

Continuity between a stator winding and earth would imply a short either on the stator itself or one of the yellow wires leading away from it. The last thing is worth a check? I've seen one pinched under a cover/body panel more than once.

There should be continuity (coil resistance) between any pair of coil wires.
____________________
“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[winz]

If it is the reg/rec Jaws do a mosfet versions here https://www.jaws-motorcycles.co.uk/birdextra.htm#regrec

Both Honda's I currently own have had replacement stators and reg/recs.

Follow Stinkwheels steps and that will help troubleshoot what's gone wrong.

It only takes about an hour or so to replace both stator and reg/rec, just remember to get a gasket for the stator cover.

https://scontent-lhr3-1.cdninstagram.com/t51.2885-15/e35/19424686_811602309011130_8014381946106806272_n.jpg
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Current Bikes: BMW K1200S
Previous: Honda CBR929RR, Honda CBR1100XX, Honda CB600F

[mudcow007]

Evenin all

Strator (an gasket) were picked up tonight from "Jaws".

fingers crossed its should be fitted tomorrow an ready to rock tomorrow.

It already has the reg/ rec from "Jaws" fitted. hopefully this is still cool

I think i will check over it my self when it back in my shed

ta

[Robby]

Test the output voltage when you have the stator changed.

I highly recommend MOSFET reg/recs. They work. I fitted one to my old VFR 750, I bought a second hand one on ebay that was fitted to a Yamaha. Not sure of the current situation, but a couple of years ago there were only 2 or 3 models of MOSFET out there. They used odd fittings, I bought the Triumph connector wires and fitted those to the Honda multi-plugs (bike loom side of the reg/rec connector).
You can remove the spade connectors from a normal multi-plug, just push down on the little tang and slide out the spade connector. Avoids the need for any chopping and soldering.

[mudcow007]

Fixed!

Steady 14- 14.8v under throttle - yay!

Charge light shows green, its never done that

[Matt B]

Well done on fixing it
Not so much for ignoring the charge indicator in the first place
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stinkwheel: He had an animated .gif of a cat performing fellatio. It's not socially acceptable. It can have real life adverse effects on other people.

[P.]

While you are there, sort the multi point earth aids wiring. Proper crap idea by Honda.

[Bikeless]

I had a CBR400 gullarm for 6 years and a 95 fireblade for 7 years, didn't suffer with any electrical problems, was i just lucky?

[mudcow007]