Modifying a regulator/rectifier

[FretGrinder]

After my recent failure with my regulator/rectifier on my varadero 125, a new one is £177 and there are no pattern parts for mine which is an 07 model.

This turned some cogs in my head...

My reg/rec has 3 yellow wires coming from the alternator and 1 green 1 red wire that goes to the battery. Could you take a reg/rec from another bike, with the same wiring configuration, and fit them onto the connectors on your own bike?

I should imagine that, if the replacement reg reg has the same voltage and amp requirements, then this should be easy.

Has anyone done this? planning to do it? or just have any advice on what I could do?

Cheers.
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Yamaha MT-09

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[pepperami]

???? Sound like it could work???? possibly.
would one off a different bike have the same ?mapping? as your bike? ie would it send the pulse/charge/spark at the right time?.

Would you have to get one from a twin cylinder bike?



Just some thoughts
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I am the sum total of my own existence, what went before makes me who I am now!

[FretGrinder]

[Kickstart]

Hi

They are very generic units, and have nothing directly to do with the ignition system.

Electrex World do list one for the XL125V, and make no differentiation between different years of bike.

https://www.electrexworld.co.uk/rr58-regulator-rectifier-779-0.html

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[FretGrinder]

[Kickstart]

Hi

What do you mean by hard wired? That has a plug in connector. Or do you mean yours has a length of wire between the connector and the regulator / rectifier? If so if the loom has enough length on it then it will probably still fit.

Failing that almost certainly swapping the connector over will work.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[FretGrinder]

[cb1rocket]

regualator/recitficier are fairly universal. This is a 3 phase type, the other is a single phase reg/rec which only has 4 wires, dont get that unless it is!

https://cgi.ebay.co.uk/250cc-Gokart-Voltage-Regulator-Rectifier-Go-Kart-/220716431741?pt=UK_CartsParts_Vehicles_ATVQuad_Trike_Parts_Accessories_SM&hash=item3363b9797d

[stinkwheel]

Yes you can fit pretty much any reg/rec from a modern motorbike with a few exceptions.

Honda ones would be easiest because they use the same wire colours (although in a different connector block) so if you connect red to red, green to green and yellow to yellow, you'll be right.

Some appear to have more than one red or green, this is a red herring, they all connect back to the same point eventually so just bundle all the reds together and all the greens together. The three yellows need to remain seperate.

Some also have an extra black wire. These will work too but you need to connect that wire to a switched live somewhere on the loom (I use the feed to the back brake light switch). It may be simpler to just get one without a black at this stage.

For slightly complex electronic reasons, some of the more modern reg/rec units are considerably superior to the older type. A Yamaha R1 or R6 one is among these. You'd need to find out where to connect the wires to though, I and others on this forum can help with that if you decide to get one of those. It would be important that this was a genuine Yamaha one from a breakers/ebay, not a pattern one. For the afore-mentioned electronic reasons, they are highly unlikely to be faulty.

If the regrec goes on my VFR again, I will definately be replacing it with an R6 one.
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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.

[FretGrinder]

[prawny1]

A lot of modern bikes use the mosfet type reg rec rather than the shunt type common on older/smaller machines.

The fh008 shindengen (oe manufacturer fh = mosfet type sh = shunt type) is 35A and can be found on late late cbr600 which should be plenty for the varadaro.

You will need to either buy a connector and wire it into your loom or just use spade connectors, all you do is wire in your generator inputs and wire the positive out to your battery via a 30A fuse then wire earth to frame or battery.

The r1/r6 reg rec is the 50A version from memory so is preobably overkill for your bike.
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hellkat wrote:

Some people are only alive cos its against the law to kill them.

[stinkwheel]

[FretGrinder]

[Gazdaman]

I fitted a reg/rec from a CX500 to my old GS500. Worked a treat.

Gaz

[Fortuna]

I did this very mod on my R1, and there was a thread on here not too long a go where we helped a forum member do the same.

Just make sure the new one is fairly modern and preferably an SCR type.
The new reg/reg must be of the same or higher amperage.

3 yellows to 3 yellows (3 phase AC)
red to red (12v)
green to black (or green if your earth is green) (Neutral)

Here is the thread at Triumph Rat
T-RAT

EDIT:

[CaNsA]

https://cgi.ebay.co.uk/honda-xl125-xl-125-varadero-reg-rec-recifire-charging-/300489297272?pt=UK_Motorcycle_Parts&hash=item45f68ecd78


you are welcome

[paulfmexico]

Hi, after reading this post and being faced with the same situation, I was really not willing to pay the outrageous £187 demanded by Honda for this part (and wait 2 weeks for delivery), I decided to give this a try. I bought a Regulator for a R1 for £50 plus delivery from ebay, snipped the wires, connected them up like for like and its working fine....so far! I checked with a voltmeter and its putting back into the battery 13.7 volts ish, I drove about for a day with no problems at all, if anything goes wrong I will update this post but so far so good. I dont want anyone else being ripped off by Honda, the one I bought fits the backplate perfectly, I hope that this helps some else!!! Best regards, Paul.

[uberkron]

Reg rec contain the same parts 99% of the time, for sub litre bikes at least you can substitute almost anything. Just dont use one from a 50 cc!
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i ride a zip 50 2smoke. It overtakes a hundred times a day.

[anand1]

Hi,

Last week after reaching my work place on Varadero 125(2008), there was rotten eggs smell near my battery and could hear a alarm sound which went off after sometime. The same day evening while returning home the bike stopped on the road abruptly and has no power coming when i turn the ignition ON. RAC tried charging the battery, but in vain and had to tow to the garage.

The garage billed me £115 for new battery and bulbs and went fine for 2 days.On the 3rd day, same smell and alarm was heard again. After browsing the web found this link and one more which says battery was cooked up due to reg rec failure. As cant afford to pay another £191 for reg rec wanted to change the reg rec by using the above alternative suggestions.

Before proceeding, i just want to make sure this will be rectified if i change the reg rec or needs any more tests?
Do i also need to change the battery?
Also can you guys give me the link to alternative reg rec as said above R1/R6 or this ebay: https://www.ebay.co.uk[/url]/itm/NEW-GENUINE-YAMAHA-FZ1-01-05-R7-99-MODEL-REG-REC-P-N-5FL-81960-00-/161050953369?pt=UK_Motorcycle_Parts_13&hash=item257f628699

Thanks.

[Timmeh]

115 for a battery? Jesus, they saw you coming. You can get them for about 15-20 quid.

As stated several years ago, most reg/recs are universal providing that they're 3ph and rated appropriately.
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GSXR400 x2 | '94 RVF400 | '93 TZR125 4DL (again)
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[uberkron]

My main trade is auto electrician, whenever bikes come in with a fried reg i lust fit a 50 amp general purpose reg/rec. They are direct fitment for anything that makes its power from a permanent magnet alternator. They generally contain four zener diodes. You can make your own reg/rec african style out of a bosch alternator rectifier plate(s) as alot of them are fitted with zener diodes to prevent overvoltage in the event of a regulator failing and giving the alternator too much excitation.,

Anybody know which bikes use a proper alternator? I wouldnt have thought thered be many out there.

The only con of using a higher rated reg/rec is that there is more power lost in the diodes so in the case of most bikes its fine, but scooters tend to only have 2 or 3 amps available and this will be less if a 50 amp reg/rec is used.
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i ride a zip 50 2smoke. It overtakes a hundred times a day.

[Bezzer]

[stinkwheel]

[Fizzer Thou]

My Exup-R has a seperate Generator that is easy to replace/repair.In 55,000 I have only had one small problem with it.

https://www.cmsnl.com/yamaha-fzr1000a-1990_model9589/partslist/C-08.html#results

I shuddered when I saw the price of a new item
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Just talk bikes.What else is there?

Always have a 'Plan B'

[anand1]

Placed an order for the following reg/rec as it states 5 wired and 3 phased. Also the advert states suits for honda 150cc which should do with my Varadero XL 125 V8.

https://www.ebay.co.uk/itm/Honda-150cc-5-wire-3-phase-regulator-rectifier-v920-/300678008778?pt=UK_Motorcycle_Parts_13&hash=item4601ce4fca