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Discussion Starter #1
I could use all of the data possible among the crowd regarding their working stators. If any of you would like to pitch in and help and test your stator at the same time, i'd certainly appreciate it. It should only take a couple minutes. Thanks in advance.

Test requires a voltmeter with VAC 100 or better. If yours is manual, set the dial to at least 100 VAC. You might also need a helping hand to hold the throttle, or at least some alligator clips.

Procedure:

Get a pencil and paper and make a little form for yourself:

Idle: ____ rpm

wires 1-2: ___ vac
wires 1-3: ___ vac
wires 2-3: ___ vac

2000 rpm

wires 1-2: ___ vac
wires 1-3: ___ vac
wires 2-3: ___ vac

4000 rpm

wires 1-2: ___ vac
wires 1-3: ___ vac
wires 2-3: ___ vac



  1. Unplug the three yellow stator wires under the tank near the rear ignition coil. Make sure they keep the ends from touching the chassis or each other.
  2. Pick any of the three wires and name it "1". Put a mark on it.
  3. Pick any of the other two wires and name it "2". Put two marks on it.
  4. The unmarked wire we'll name "3".
  5. Start the bike.
  6. Read the tachometer and record your idle RPM
  7. Measure the vac across wires 1 and 2 and record the reading.
  8. Measure the vac across wires 1 and 3 and record the reading.
  9. Measure the vac across wires 2 and 3 and record the reading.
  10. Rev the bike to 2000 rpm and record all three measurements.
  11. Rev the bike to 4000 rpm and record all three measurements.
  12. Turn off the bike before reconnecting the wires.

Post your results here in this thread. You can copy/paste the form i made above to save you some hassle. ;)

The results will be used in research and development of a better/cheaper regulator mod that people can build themselves.

Thanks again :)
 

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Linkmeister Supreme
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Discussion Starter #3
I do not understand all the tech jargon about electrical topics, but wonder if you have seen this thread RH?
http://www.vn750.com/forum/19-electrical/21908-mosfet-r-r-installation-pictures-notes.html
The mosfet r/r seems to have solved the low voltage charging problem many vn750s experience.
Hey Hoss!

Yups, i read that thread quite awhile back.

Here's a couple of jargon notes for you:

A transistor is a rock crystal that a bunch of guys grew like a sugar-cube in a lab. Except they use silicon instead of sugar. That's all it is.

MOSFET is a rock crystal too, but it uses Metal Oxide instead of the old type of sugar.

Here is the difference between them. About 20 years of guys working in labs figuring out how to grow rocks.

The OEM regulator is 1960's technology.
The MOSFET is 1980's technology.

Now that means if you put a MOSFET regulator in your bike, you are more than likely missing out on 30 years of work that other people already did.

And here is the kicker.... the amount of progress of electronic technology that occurred between the 20 years of 1960 and 1980 is staggering. Be that as it may be, the 30 years between 1980 and 2010 saw four times as much technological advances in the same industry.

So now think about it this way... if MOSFET did such a great job with only 20 years of technology, then can you imagine what another 30 years would do? ( or 80 years, depending how you look at it ).

And the MOSFET is still using that big old heatsink and putting a strain on the stator and the engine when it don't need to do so....

It should make sense to replace that old thing with something about 1/4 the size that doesn't generate any heat worth noticing, and frees up the stator when it's supposed to ( which means more horsepower to the drive train ), right?

Ever heard of a thumb-drive? Back in the 80's we called them "rooms". :)


Hope this helps
 

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1986 VN750
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RoadHopper, honestly, you're putting a lot of effort into something that doesn't need another solution. Yes it's 1980s tech, but it works.. GREAT. It works so great every motorcycle manufacturer, from the Japanese to the Italians, use MOSFET regulators. Italy LOVES to throw money at stuff, so if there was something worth while doing, they would have done it for kicks on something that's $60,000.

I think you should add an external alternator if you want to improve charging on your bike. Stators, oil supply, and heat are the weak spot, not a MOSFET.

Not sure how you're going to beat a $20-30 mosfet regulator off eBay with a DIY application, either. The time involved will negate any savings, and I don't see any way it's going to improve charging so much that it'd warrant it.

I know projects are fun but sometimes you need to take a step back and look at the big picture. :)

I'd start by making simplified wiring harness. Rip out the junk, use quality thicker gauge wire composed of thin stranded copper. If you are unhappy at that point with the mosfet, then look at it.

I'm not trying to discourage creativity, just maybe the effort should be redirected elsewhere..
 

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He likes reinventing the wheel.


Seriously if I spent that much time working on my bike I'd toss it off a cliff and get another one.....;)

"The results will be used in research and development of a better/cheaper regulator mod that people can build themselves."

Really?
And why should any of us go test their stators if they know they are working?
 

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FREEBIRDS MC CENTRAL NY
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@Knifemaker he wants to see right around where everyone's readings are at
 

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FREEBIRDS MC CENTRAL NY
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Discussion Starter #9

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Discussion Starter #10
RoadHopper, honestly, you're putting a lot of effort into something that doesn't need another solution. Yes it's 1980s tech, but it works.. GREAT. It works so great every motorcycle manufacturer, from the Japanese to the Italians, use MOSFET regulators. Italy LOVES to throw money at stuff, so if there was something worth while doing, they would have done it for kicks on something that's $60,000.

I think you should add an external alternator if you want to improve charging on your bike. Stators, oil supply, and heat are the weak spot, not a MOSFET.

Not sure how you're going to beat a $20-30 mosfet regulator off eBay with a DIY application, either. The time involved will negate any savings, and I don't see any way it's going to improve charging so much that it'd warrant it.

I know projects are fun but sometimes you need to take a step back and look at the big picture. :)

I'd start by making simplified wiring harness. Rip out the junk, use quality thicker gauge wire composed of thin stranded copper. If you are unhappy at that point with the mosfet, then look at it.

I'm not trying to discourage creativity, just maybe the effort should be redirected elsewhere..

I appreciate where you're coming from TH, but then again, you haven't got a clue what 30 years of new technology has done for the electronics industry. Seriously. I don't mean that as a put-down or anything, it's just a fact.

And your MOSFET has a heat sink on it, right? Right.

:nerd:
 

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How would you get rid of excess voltage without producing heat?
You suggest finding something more "modern" to take the place of the MOSFET R/R, but have no idea what it would be.
Is there something wrong with heat sinks? Have you heard of Occam's Razor?
;)


And giving you the stator output to my 2012 Triumph Bonneville would be of no use to you.
 

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Occam's razor, oh brother.

And giving you the stator output to my 2012 Triumph Bonneville would be of no use to you.
How do you know? Why not let him decide?

KM, dunno why ya gotta spaz when someone asks questions here. You did the same thing to me when I started posting here.

You don't seem to have much interest in things that are VN750, maybe you have one in a shed collecting rust and that's about it. So your advice to new members is shut up, read what's already posted, and get lost in the search function. Is that about right?

The man seems to have a lot of electronics knowledge, why try to stifle that? Isn't part of your job as moderator to stimulate conversation on the forum and invite discussion for the benefit of all and by doing so, encourage new membership? Who is to say he can't improve on something? You? LOFL Maybe you should skip threads that don't interest you, like the ones about the VN750. You don't have to be schoolmarm on every word.

Roadhopper, I'll check mine when I can, may not be real soon though. I meant to do that as soon as I hooked it all up, but was in a hurry to ride. Actually thought about trying to get readings for you today, but it didn't happen. I need a baseline for future reference anyway, I don't recall anyone posting what a TPE/MOSFET puts out in ac volts.

Keep on keepin' on! I may not understand everything you say, but you invent a better mousetrap and I'll smash some fuzzy little heads with it.
 

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I appreciate where you're coming from TH, but then again, you haven't got a clue what 30 years of new technology has done for the electronics industry. Seriously. I don't mean that as a put-down or anything, it's just a fact.

And your MOSFET has a heat sink on it, right? Right.

:nerd:
You make a lot of assumptions at my electronics knowledge. You know what they say about assumptions...

You won't be pulling any magical power from the ether. The regulators are not inefficient by any means, doesn't matter what year the technology comes from. Feel free to find out the hard way, but I'd get that simplified harness done way before building another r/r.
 

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If he has so much electronics knowledge, why is he asking questions? I'm sorry, I don't mean to poop on his parade, but his take here seems to ask folks to volunteer their time to test their stator just so he can use the information to what? Build something better than what's available?
He's offered no possible replacements, other than maybe something will be invented in another 30 years?
We live in the here and now, and as much as I like dreamers, this thread has no usable information about possible replacements for the stock R/R other than the favored MOSFET R/R.

He's already mentioned in another thread I thought ...that his stator is bad.
Perhaps he should fix it and not expect everyone to do his bidding on providing numbers of their working stators for some unknown reason. We already know how to test for acceptable output.

Of course, this is just my opinion, and you all are free to to do what you want.

I'm not "spazing out" , just commenting on what again sounds like over thinking a fairly simple thing ....with proven remedies.


But yeah, you're right, what do I know. Maybe he'll invent a new regulator/rectifier and make millions of dollars selling it to all the bike manufacturers ....
 

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If he has so much electronics knowledge, why is he asking questions?
Uhh, research? He only has the one bike and you know the condition of that.

I'm sorry, I don't mean to poop on his parade, Sure ya did. but his take here seems to ask folks to volunteer their time to test their stator just so he can use the information to what?
So? Two of us said we would. Don't want to, then don't. But don't try to belittle the man's endeavors. Build something better than what's available? Why not?
He's offered no possible replacements, other than maybe something will be invented in another 30 years? Huh? He has to start somewhere. You want instant gratification? Whip out the credit card and as usual just go buy new.
We live in the here and now, and as much as I like dreamers, this thread has no usable information about possible replacements for the stock R/R other than the favored MOSFET R/R. This thread never got off the ground before you started firing cruise missiles at it. The here and now happens to involve keeping the VN running, making it our own, and improving it to our satisfaction.

He's already mentioned in another thread I thought ...that his stator is bad. Now you're cooking with both burners.
Perhaps he should fix it Looks like's planning on it. and not expect everyone to do his bidding on providing numbers of their working stators for some unknown reason.Why not? I thought we were here to help and be helped, well most of us. We already know how to test for acceptable output. Who said we didn't?

Of course, this is just my opinion, and you all are free to to do what you want.Are we? Or will we be belittled because we asked the wrong question?

I'm not "spazing out" , just commenting on what again sounds like over thinking a fairly simple thing ....with proven remedies. Jeez, why'd you spend all that time making stuff. The bike comes with a dash and footpegs already.


But yeah, you're right, what do I know. Maybe he'll invent a new regulator/rectifier and make millions of dollars selling it to all the bike manufacturers .... Well which is it? You throwing the green flag or the black flag?
So let's recap. You are stingy with your time and reluctant to help others- check.

You hate fixing stuff and would rather just throw money at something new, and you think everyone should do the same. - check check

Are you only here to correct grammar and try to control the entire forum? Heaven forbid someone asks the wrong question on your forum.

I'm hearing that buzzing noise again, yup, the Schwinn is backpedaling.
 

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FREEBIRDS MC CENTRAL NY
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Hmm we'd still be shaving with ****ing stones if people didn't think outside the box.
 
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FREEBIRDS MC CENTRAL NY
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So let's recap. You are stingy with your time and reluctant to help others- check.

You hate fixing stuff and would rather just throw money at something new, and you think everyone should do the same. - check check

Are you only here to correct grammar and try to control the entire forum? Heaven forbid someone asks the wrong question on your forum.

I'm hearing that buzzing noise again, yup, the Schwinn is backpedaling.
I've got a question but am afraid of the answer;)
 

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I've got a question but am afraid of the answer;)
Now Doc, you know I don't bite. >:) Hell, I might be afraid of the question.

I know what's wrong with me. I'm sitting here at the computer and I can hear the racetrack 10 miles away, and I'm not there.
 

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Hmm we'd still be shaving with ****ing stones if people didn't think outside the box.
LOL! Them Bic dinosaur bones would nick hell out of you. Was glad to throw the last one away. I used fire for a while, wouldn't recommend it. :surprise:
 

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FREEBIRDS MC CENTRAL NY
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LOL! Them Bic dinosaur bones would nick hell out of you. Was glad to throw the last one away. I used fire for a while, wouldn't recommend it. :surprise:
Haha been there with the fire.just don't use Occams razor
 
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