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MOSFET Regulator/Rectifiers - The Why & The How

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Old 04-01-2012, 12:48 AM
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Well... Riding bitch might hurt your pride... But since with a failed open diode in the R/R it will put out 15-16V at idle and more if you go above idle, it's the only option that won't take out your ECU... The only possible way you could limp that bike home is to ride all the way in first gear, hand off the throttle.. And even that is risky...

Either go find a Honda dealership locally and get raped for a crappy OEM replacement R/R... Or scrounge up a good replacement and a place to do the work, or put the bike on a trailer/truck home... All the other options will bite you in the ***...
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Old 04-01-2012, 10:35 AM
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Thanks for the info. I was able to get my dad to start heading this way with my friends truck.
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Old 04-01-2012, 12:11 PM
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I just finished switching over my R/R to a Mosfet-type (Shindengen FH012AA) so thanks again Markus for raising awareness of this issue. I dreaded the thought of an R/R failure taking out my new (and oh so rare and hard to find) HRC ignition box....

cheers
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Old 04-01-2012, 08:10 PM
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Originally Posted by mikstr
I just finished switching over my R/R to a Mosfet-type (Shindengen FH012AA)
cheers
took you long enough

I bought the same one a few months ago...haven't installed it yet :dunce:
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Old 04-01-2012, 08:40 PM
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I have a question.....why isn't anyone but me using thermal paste on the stock one? Not one mention of thermal paste anywhere. Anyone who's repaired a processor in a PC, or replaced a module in a automotive distributer knows how critical a thermal bond is with the backing plate/heatsink. The backside of the R/R is polished metal for a reason, and so I applied some thermal paste when I reinstalled it as I noticed some discoloration of the paint where it attaches. I didn't realise these were a problem until I saw this thread, and after reading the very well thought out commentary on why I should upgrade, I didn't see any mention of thermal paste. Not trying to whiz on anyone here, just would like to know if this has already been tried or not and were the results positive.

Tracy
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Old 04-01-2012, 08:45 PM
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Originally Posted by HU112BU
I have a question.....why isn't anyone but me using thermal paste on the stock one? Not one mention of thermal paste anywhere.
This one mentions the paste: https://www.superhawkforum.com/forum...21/#post240165
And this one: https://www.superhawkforum.com/forum...68/#post184506
And this: http://www.burniemorgan.com/firestorm/reg_heatsink.html
Here, another member asks the question: https://www.superhawkforum.com/forum...44/#post266890
And another: https://www.superhawkforum.com/forum...63/#post253150
And here: https://www.superhawkforum.com/forum...17/#post297866

I can do this all night...

Not really, I'm done.

Find them all here=> MAGIC

Do the same search for "thermal" and you will find even more talk, like this one: https://www.superhawkforum.com/forum...51/#post227016

Last edited by rz_racer_69; 04-01-2012 at 08:59 PM.
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Old 04-02-2012, 07:00 PM
  #97  
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So Tweety,
My question is...of the recommended R/R models in the early posts: which ones can handle the outputs of the SuperHawk. The 600s seem to take an FH008 model, and the bigger bikes take an FH0012 or 0014 or 0015.
Which ones will work? I still have a working stock model, but don't want it to die soon/unexpectedly.
Andy
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Old 04-02-2012, 07:22 PM
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Originally Posted by Spoot
took you long enough

I bought the same one a few months ago...haven't installed it yet :dunce:
Indeed it did, I have had it sitting around for a few months now. Call it procrastination as things electrical kind of scare me (fear of messing it up). I ordered some pre-wired and assembled connectors from Eastern Beaver to simplify the job. Truth be told the hardest part of the job was playing around with the exact positioning and drilling the hole in the subframe to hold it in place.

Alas, it's now done, and my beloved HRC ignition is now safe

Last edited by mikstr; 04-02-2012 at 07:25 PM.
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Old 04-02-2012, 07:34 PM
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Originally Posted by ridinon0$
I am hoping that you guys monitor this thread. We are on a 3 day ride. We left Friday afternoon from Tulsa and when we got to Fayetteville, my bike wouldn't start. I jump started it and went to Autozone and got a new battery. I had it on the battery tender over Thursday night and my battery was about 4 years old. It seemed pretty warm but I just chalked the issue up to age. Today we were 200 miles into the trip, buzzing along and my bike just quit all together. No lights at all. The day old sealed battery was smoking - I think the battery acid was seaping out around the edges creating the smoke/steam. So, my buddy went and bought new battery number 2 for the weekend as we were 50 miles from anywhere. The bike started up again, the headlight bulb has burned out and the tach doesn't work. All other lights and functions are fine.
Anyway, limped to our hotel 40 miles away (which was interesting without a headlight after dark).



Now I am wondering what I can do to limp home in the morning:
  • Can I get a voltmeter and find the peak rpm that creates 14.4V or less (assuming a fuse fixes my tach or memorize the sound at that rpm)? Then just keep it under that until we make it straight home.
  • Do I need to drive, say, an hour at a time and them stop to let everything cool down for 30 minutes? Both failed batteries were pretty hot. But I don't normally mess with the battery to know if that is really normal.
  • Just ride and have a good time and see if I can make it home before I cook another battery?
  • Am I going to cause more problems by riding the bike like this? Riding bitch back to Tulsa and coming back with a truck doesn't sound too tempting...
btw - I replaced the R/R several years ago after it failed (with whatever the bike shop had on hand) on another trip. My bike is a '98. I have not seem any melting wires. I looked at my RR today and it has broad, yet closely placed fins and it is plug and play (same harness). Now that I have looked at this forum I see that there are several types - I can't look at it now to get ID markings since it is dark outside...

Any help would be appreciated!
Thanks,
John
Quoting myself to keep any pertinent info together.

I just checked voltage on a few things:
  • burned out headlight (happened when my battery failed): 12v at the socket
  • front indicator light above headlight (I noticed this a few months ago but didn't mess with it): 12v at the socket
  • tach: I finally checked and all fuses are intact and it doesn't have it's own fuse. I will check this later to see if it is getting voltage or not. I 'spose I don't require a tach to ride...
  • battery with bike off: 13.4v
  • battery with bike at idle: 14.0v
  • battery with bike at various rpms: 13.8v-14.0v

This is what my regulator looks like.
The website says: 12 Volt, 14.4 Voltset
Replaces: Honda: 31600-MV4-000, 31600-KY2-703
Shindengen: SH633-12

The sticker on the back of mine says "0615 U.S." There isn't enough info to bring up a search result on "0615 U.S."... I did notice that someone has marked on the connector with a marker... I could not disconnect it from the wiring harness on my first go...

Anyway, I just wanted to check to see that these symptoms do align with a failing R/R. It seems that mine is failing slowly since I am seeing good readings right now.

If I do in fact need a R/R, is it okay to buy something like this used?
It looks like my options are:
universal kit on ebay: $125
Used Kawasaki R/R on ebay: $39 to $95
I don't see any results on other options where I can see the markings to verify it is a mosfet style.

Any advice on this would be greatly appreciated!
Thanks,
John

Last edited by ridinon0$; 04-02-2012 at 07:42 PM.
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Old 04-02-2012, 08:29 PM
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I would buy a used MOSFET over a new oem any day of the week. Yes, your R/R is showing symptoms of failing. Especially since it has failed before and you only treated the symptoms, not the cause.

If you buy a MOSFET, you will need to do a small amount of wiring work. It's very easy, I would trust just about anyone to handle the operation, but know that it will not be plug and play.

The easiest way to tell if its MOSFET is if it has and FH at the front of the markings. Yours has and SH at the beginning, indicating the older shunt based regulator. Tweety put a list in at the beginning of the thread... the universal kit that you listed is a great option as it is a MOSFET R/R with a waterproof wiring harness. Basically it's everything you need at a good quality.

Last edited by 7moore7; 04-02-2012 at 08:31 PM.
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Old 04-02-2012, 08:57 PM
  #101  
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Mik,
Which R/R did you have & which EB harnesses did you buy? I'm looking to do it that way, and which one works would help me.
Thanks, Andy
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Old 04-02-2012, 11:11 PM
  #102  
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Originally Posted by ridinon0$
It seems that mine is failing slowly since I am seeing good readings right now.
Well, I'm just guessing here, but you took these readings with the bike at idle on your driveway most probably... You might consider the fact that the failures of the diodes inside the R/R usually show up when they are up to temp, after 30+ minutes of riding... I'd say your results are very typical of needing a new R/R... Pronto...
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Old 04-02-2012, 11:29 PM
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Originally Posted by 102dals
So Tweety,
My question is...of the recommended R/R models in the early posts: which ones can handle the outputs of the SuperHawk. The 600s seem to take an FH008 model, and the bigger bikes take an FH0012 or 0014 or 0015.
Which ones will work? I still have a working stock model, but don't want it to die soon/unexpectedly.
Andy
Eh... How about all of them? Why on earth would I recommend an R/R that didn't work?

The newer model bikes all have a lot more electronics than our old bike, so even the 600's have an R/R capable of outputting more than our bike needs...
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Old 04-03-2012, 05:56 AM
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Originally Posted by 102dals
Mik,
Which R/R did you have & which EB harnesses did you buy? I'm looking to do it that way, and which one works would help me.
Thanks, Andy
Hi Andy,

I picked up a DIY R/R kit on eBay (just do a search using the model listed). It comes with most of what you need. I then ordered some cables with ready-made connectors (ones that fit into the RR, one grey and one black) and went from there. I ended up with some duplicate parts (connectors and wire) as a result but having the EB stuff helped allay my fears about my own electrical incompetence.

You can surely just buy the RR alone and get the EB wire harnesses. It`s a straight splice and connect job after that.

Good luck!
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Old 04-03-2012, 05:55 PM
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Thanks Tweety, I didn't mean to insult/offend. $$ are obviously tight now, and I hate having to do this twice.
Andy
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Old 04-04-2012, 12:26 PM
  #106  
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Originally Posted by 102dals
Thanks Tweety, I didn't mean to insult/offend. $$ are obviously tight now, and I hate having to do this twice.
Andy
None taken...

It was more idle curiosity... I was really baffled by the thought that I'd recommend something that wouldn't work...

If it's listed, it's verified to work... (or noted otherwise)
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Old 04-05-2012, 07:06 AM
  #107  
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It may seem $$$, but roadstercycle.com has a FH012AA super mosfet R/R kit for $137. Everything is already put together, just hook up the new
battery cables and the 3 wires to the stator and your done.
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Old 04-05-2012, 07:43 AM
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Originally Posted by mikstr
I just finished switching over my R/R to a Mosfet-type (Shindengen FH012AA) so thanks again Markus for raising awareness of this issue. I dreaded the thought of an R/R failure taking out my new (and oh so rare and hard to find) HRC ignition box....

cheers
Hey mikstr,
It looks like you installed the same model that comes in the universal kit on eBay. My plan was to (painfully) figure out the wiring for that unit and then post it here but it seems that you just worked it out. Would you mind laying that out for us?
Thanks,
John
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Old 04-05-2012, 08:21 AM
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Originally Posted by ridinon0$
Hey mikstr,
It looks like you installed the same model that comes in the universal kit on eBay. My plan was to (painfully) figure out the wiring for that unit and then post it here but it seems that you just worked it out. Would you mind laying that out for us?
Thanks,
John
Seriously dude... It's been posted a number of times... Once in this thread as well...

And even if it hadn't been posted, how hard is it? There's two plugs, one with three wires that goes to the stator (no polarity, hook them up any order you like), and one with two wires going to the battery... The only thing you could manage to muck up even if you tried was to hook the positive and negative up in reverse, and blow a fuse... Other than that it's idiot proof...
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Old 04-05-2012, 08:33 AM
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Tweety, it wasn't posted on this page so it doesn't count!
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Old 04-05-2012, 08:53 AM
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Originally Posted by 7moore7
Tweety, it wasn't posted on this page so it doesn't count!
You are absolutely right... I stand corrected...
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Old 04-05-2012, 09:09 AM
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Originally Posted by Tweety
Seriously dude... It's been posted a number of times... Once in this thread as well...

And even if it hadn't been posted, how hard is it? There's two plugs, one with three wires that goes to the stator (no polarity, hook them up any order you like), and one with two wires going to the battery... The only thing you could manage to muck up even if you tried was to hook the positive and negative up in reverse, and blow a fuse... Other than that it's idiot proof...
I had some downtime so I read through this thread on my phone and looked for a diagram specific to the fh012aa. I saw that mikstr just installed that exact model. Otherwise, when I received the kit in the next few days, I was going to post my own solution to that specific RR - for the benefit of others. Also, I don't have any EE training. Here are the electrical mods in my bike - Battery tender lead hooked up to battery and a replacement license plate light after I cut off the stock fender. I appreciate this thread and I was trying to contribute to it - albeit at a kindergarten level.
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Old 04-05-2012, 09:53 AM
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He's just having fun 'cause it's pretty uncomplicated. Pretty much all R/R's are the same for sportbikes. 3 yellow wires in any order (ok, maybe a couple of them have 2). One hot and one ground wire. Aaaaaand you're done.

But for someone who doesn't know that, I get your point. Maybe I can take a picture of mine tonight (as it would pretty much be a wiring diagram). There are a few fh---- models out there with exactly the same wiring.
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Old 04-05-2012, 11:42 AM
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Well if that is all there is to it, I can understand the frustration with my comment... Even though, i think people at my level would still get good use out of seeing a pic.
Thanks,
John
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Old 04-05-2012, 01:17 PM
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Originally Posted by ridinon0$
Well if that is all there is to it, I can understand the frustration with my comment... Even though, i think people at my level would still get good use out of seeing a pic.
Thanks,
John
No frustration really... I gave the answer along with what was meant as a friendly ribbing...

Just FYI, there are about 5 different threads, with the exact info, pictures and explanations... A valuable skill on this forum is to search, there are heaps of info availabe in "old" threads... And once you have read them, if you have a follow up question, we'll gladly answer it... But when you ask one of the top ten or so most asked questions, me and others will have a bit of fun with you before handing the answer on a silver platter...

Besides, I do come with a warning label nowadays, on popular demand... See the sigline...
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Old 04-07-2012, 08:34 AM
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Alright, I think I have got it down, but if it isn't obvious, I am not totally confident. If I did it right, then it is a guide for others. If I did it wrong, hopefully I can get it right with a little feedback . I have just mocked the wires into place. The 3 yellows are in any order. I am using the fused lead straight to the battery and I will tape off the existing red wire. I still need to mount the ground wire through the bolt.
How did I do?


Universal Mosfet RR on eBay
Also, I think I lost one of the waterproof boots - Can I just fill one of the holes with glue?
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Old 04-07-2012, 11:55 AM
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Originally Posted by ridinon0$
Alright, I think I have got it down, but if it isn't obvious, I am not totally confident. If I did it right, then it is a guide for others. If I did it wrong, hopefully I can get it right with a little feedback . I have just mocked the wires into place. The 3 yellows are in any order. I am using the fused lead straight to the battery and I will tape off the existing red wire. I still need to mount the ground wire through the bolt.
How did I do?


Universal Mosfet RR on eBay
Also, I think I lost one of the waterproof boots - Can I just fill one of the holes with glue?
Yes but I think I have a spare. If you want it PM your address.
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Old 04-07-2012, 12:10 PM
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You got it! At least that's how mine is wired. Now if anyone needs a pic or wiring diagram we have super extra large one in the thread.

On the very small off chance that you blow your main fuse when you turn it on (it'll happen as soon as you turn the key) Just switch the red/green wires and replace your fuse
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Old 04-07-2012, 04:45 PM
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Your ground (green) wire looks like to light a gauge; it should be maybe at most one size down from the hot (red) and also go direct to the battery. The OE hot (red/white) should be snipped off or better, used to power an auxiliary circuit like a second rear brake light (with a new in-line fuse). The OE ground can be used for the negative for the same auxiliary circuit.

Note the OE hot & ground in photo 10 in the background. Since its a DC circuit the OE red/white can back-feed from the main fuse instead of feed in. Easy way to supply another circuit or even a small load center (buss bar).
Attached Thumbnails MOSFET Regulator/Rectifiers - The Why & The How-p0001_250212.jpg   MOSFET Regulator/Rectifiers - The Why & The How-p0002_250212.jpg   MOSFET Regulator/Rectifiers - The Why & The How-p0010_260212.jpg  
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Old 04-07-2012, 08:28 PM
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Originally Posted by skokievtr
Your ground (green) wire looks like to light a gauge; it should be maybe at most one size down from the hot (red) and also go direct to the battery. The OE hot (red/white) should be snipped off or better, used to power an auxiliary circuit like a second rear brake light (with a new in-line fuse). The OE ground can be used for the negative for the same auxiliary circuit.

Note the OE hot & ground in photo 10 in the background. Since its a DC circuit the OE red/white can back-feed from the main fuse instead of feed in. Easy way to supply another circuit or even a small load center (buss bar).
Good info. I will switch out the ground in the morning. I actually just buttoned it up - started right up and I had 14.2-14.4V. I am anxious to get a test ride to see how it goes. Next up, non-functional tach.

Crankenfine - thanks for the offer but I couldn't wait to get everything together.

Thanks to all for the informative thread and helpful feedback!
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