Mosfet Regulators.

PAD

Registered User
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#21
Note the wording of that ad. It refers to, and claims that it ‘fits’( whatever the hell that means), a Shindengen MOSFET unit and also claims to be an upgrade for... something not specified. It does not actually claim to be a MOSFET equipped device, but I think this ad., along with numerous others on eBay and elsewhere, is misleading. This has to be one of the ones we have been warned about for a few years now.

As for exactly what you will be getting... Feck knows! But at that price, including postage and packing from the arse end of China, it just has to be very suspect. I wouldn’t entertain even the idea of fitting one to a bike.

Nevertheless, good luck with it! I hope it works out ok long term.
 
#22
I’m dubious about it too. The description states it’s the mofset saying has thermal cut out . I got my reg rec for under £7 and it tests ok every week for 5 months. Thank you for whisking me good fortune. Flea bay is a bit of a gamble.
 

trumpet

Registered User
#23
Beware the Eastern Beaver wiring mod ! The in line blade fuse and holder melted on mine and others leaving us with no charging. Its a bit of a weak spot. Anyone that buys too good to be true electronics deserve all they get You get what you pay for, and sometimes you don't even get that !
 
#24
I was so surprised about the reg rectifier when it eventually turned up I bench tested it first with a rudimentary set up which involves me deliberately switching dc between the three yellow wire terminals and measuring the output. Thanks for the warnings. I have been burnt in the past by things from China but sometimes it is worth the wait others eBay protection with PayPal means can get money back. Will have to wait and see if it too good to be true or not.
 

fink

living up to the name
Site Sponsor
#25
Beware the Eastern Beaver wiring mod ! The in line blade fuse and holder melted on mine and others leaving us with no charging. Its a bit of a weak spot. Anyone that buys too good to be true electronics deserve all they get You get what you pay for, and sometimes you don't even get that !

If you use cheap Chinese fuses they are the ones that tend to melt. I used to use the same type of fuse holders on my harnesses and never had a problem with them.
 

PAD

Registered User
Site Sponsor
#26
Just as an illustration of why I think these ads are deceptive, here’s the listing title:

“12V Voltage Regulator Rectifier Upgrade Kit Fits Shindengen Mosfet FH020AA”

And here is the item description:

8871B814-D74A-4439-8387-B71A5F7A36C8.jpeg

Nowhere is it stated that this item is a MOSFET device. This is the only UK listing with this title (there is a US one that is identical but with a different seller i.d.). Yet Cornish monkeyboy has clearly gained the impression otherwise, and I’d lay money on his not being alone in that.

I guess the bottom line is, if you aren’t going down the tried and tested (e.g. Shindengen) route, you pay your money and you take your chances. Look at my experience with MTP Racing’s MOSFET r/r (not Chinese according to them).
 
#27
Is there a way to test and distinguish between mosfet and diode type rectifiers with a multimeter?


I don’t believe it is a mosfet I’m curious to find out if it is or not. I do agree it is very misleading if it isn’t mosfet. However, a marvellous bargain if it is ! I’m honestly expecting a standard reg rec in mosfet clothing. There are no part numbers on the image it may even just be a brick and it’s resin backed not like the shendigen whatsimecalled ones.
 

PAD

Registered User
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#28
Not without an oscilloscope, I should think!

I’d be surprised if it didn’t work, but for how long seems to be the issue. I’m a bit dubious about the overheating protection. If it switches off when hot, it might spend a fair bit of time doing bugger all!:eek::)
 

trumpet

Registered User
#29
If you use cheap Chinese fuses they are the ones that tend to melt. I used to use the same type of fuse holders on my harnesses and never had a problem with them.
It was the original fuse and holder supplied in the Eastern Beaver kit. Replaced with a huge waterproof screw tag thingy that definitely wont melt.
Best to keep an eye on it. mine went after two years.
 

mangocrazy

Registered User
#30
That item listing that PAD referenced has 'AVOID' written over it in great big dayglo letters. If it is a Shindengen Mosfet FH020AA, then it would have clearly said so. To say that it fits a Shindengen Mosfet FH020AA is totally meaningless and almost certainly misleading.
 

JZH

VFR Club Bodger
#31
It could be one of those "made in the same factory" deals...but why take the chance? S/h genuine Shindengen MOSFET reg/recs are all over eBay. Tried and true.

I'm surprised about the problem with the Eastern Beaver wiring harness. Jim (he's Canadian, I believe) usually makes very high quality items, and he is very knowledgeable about motorcycle wiring (and, I imagine, charging systems in particular--he's a VFR owner!) For a fuse holder to overheat, it was most likely either zapped with high voltage from a failing reg/rec or its environmental sealing (if any) failed and the contacts were allowed to corrode, creating resistance and (thus) heat. Any pics?

Ciao,

JZH
 

PAD

Registered User
Site Sponsor
#32
Corrosion, high resistance and overheating... In a VFR charging system... Shirley not?:eek::)
It would be ironic that such would occur in a product aimed at resolving OE issues, but the suggestion has merit nonetheless.

I really like the electronic protection provided by Roadstercycle in their ‘super harness’. In fact, the whole kit, as seen recently on Advancing Age’s VTEC, looks pretty impressive.
 

JZH

VFR Club Bodger
#33
I've invested in the tooling and materials to make my own wiring harnesses these days, but that looks like it's made using proper materials.

Ciao,

JZH
 

trumpet

Registered User
#36
It could be one of those "made in the same factory" deals...but why take the chance? S/h genuine Shindengen MOSFET reg/recs are all over eBay. Tried and true.

I'm surprised about the problem with the Eastern Beaver wiring harness. Jim (he's Canadian, I believe) usually makes very high quality items, and he is very knowledgeable about motorcycle wiring (and, I imagine, charging systems in particular--he's a VFR owner!) For a fuse holder to overheat, it was most likely either zapped with high voltage from a failing reg/rec or its environmental sealing (if any) failed and the contacts were allowed to corrode, creating resistance and (thus) heat. Any pics?

Ciao,

JZH
Just keeping to the facts. I've never lost a stator yet. Swapped to an FH020AA with the Eastern Beaver wiring mod before I had any issues. Just because it happened to me doesn't mean its a common problem. No corrosion, just a meltdown, and an indication that the charging was failing on the multicolour LED battery staus monitor at tickover.
 
#37
Rite then! the little box turned up and it has the resin backed regulator in it and the connectors with a fuse holder too. so it is as pictured I have tested it with a multimeter and the gates work correctly and there is less resistance I am thinking of some sort of meter to keep an eye on it rather than weekly checks. What sort of setups do you guys have ?

I am remaking the original loom and contemplating fitting this instead of the £6.somthing reg rec that is allot smaller than OEM rectifier and seems to get extremely hot too.
 
#38
'Scuse post from a CBR6'er. Here is a voltmeter I fitted.

Voltmeter.jpg

You can find this small voltmeter by searching for RioRand waterproof digital motorcycle voltmeter. I bought it direct from RioRand.

I connected it across the battery with reasonably large wires to mitigate voltage drop. The voltmeter is switched on with the ignition, via a relay energised by a "Fink auxiliary harness".

Whilst riding I can keep an eye on the voltage, which for my my CBR600 is 14.1 volts. Peace of mind.
 

PAD

Registered User
Site Sponsor
#39
I have fitted a Gammatronix LED battery level and charging monitor. I installed mine very prominently, on the top surface of the near side lower fairing panel, but there would be plenty of other potential locations.
 
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