Author Topic: Build thread on my Yamaha XZR650 racebike to a street bike. SELLING BIKE  (Read 41497 times)

Rikugun

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #100 on: July 19, 2010, 11:27:49 AM »
I've seen this discussion before (outside of this forum) and find it interesting although It's admittedly beyond my understanding of electrons and there habits. Some of the articles I've read start with the disclaimer that the goings on inside the R/R are conjecture since the manufacturers keep certain proprietary circuitry/components unpublished. This has me wondering if anyone really knows precisely what's going on in there!

Just cause I like playing the devils advocate...What if the stator isn't under load 100% of the time despite having a permanent magnet? What if (through resistors set to different thresholds) the 3 stator legs are sequentially shut down (ie grounded) to limit output as system (DC) voltage increases? When grounded, is current actually produced to be "dumped" to ground?  Under this scenario, the alternator does not have output at a constant 100% but rather is monitored and modulated to keep the eventual DC output within predetermined thresholds.

While all this makes for fascinating discussion, I try not to think about it while riding. Personally, if my gage is reading 13-14 volts and the various connections aren't melting, I'm happy.  ;D



It is far better to grasp the universe as it really is then to persist in delusion, however satisfying or reassuring.  Carl Sagan

Brian Moffet

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #101 on: July 19, 2010, 12:57:36 PM »
What if the stator isn't under load 100% of the time despite having a permanent magnet?

When a permanent magnet generator is spun at a constant speed, you get a constant AC voltage (meaning the RMS Voltage is always the same). You do not get a constant current though.  Since the Voltage is constant, the current is dependent on the resistance drawing on that voltage.  The lower the resistance the higher the current.



Brian

inanecathode

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #102 on: July 19, 2010, 02:12:53 PM »
Well the whole discussion is moot anyway, the whole problem for why the vision keeps blowing stators is the wires coming from the stator core are the wrong diameter and color.
The virago i took the stator from had YELLOW wires that were SLIGHTLY larger in diameter, and that stator was fine, how can you explain THAT?
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fiat-doctor

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #103 on: July 19, 2010, 04:00:12 PM »
Inane, I think you are onto something there... the wire diameter anyway...   
Since a larger wire can carry more current than a smaller one (without overheating) perhaps the final solution is a stator with a small amount less of a slightly larger diameter wire with high temp insulation.
Steve

inanecathode

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #104 on: July 20, 2010, 05:05:01 PM »
I was just kidding doctor, i just get so burnt out on the stator discussions. Alot of ideas but no solutions.
Someone should just fit a PTO and run a car alternator and be done with it.
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Lucky

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #105 on: July 21, 2010, 10:31:00 AM »

Someone should just fit a PTO and run a car alternator and be done with it.

Someone did a long time back... sorry, don't remember who, probably in the archives, but i know it was ugly as hell! lol
« Last Edit: July 21, 2010, 10:59:13 AM by Lucky »
1982/3 XZ550 Touring Vison, Gold on Black

johnclemens

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #106 on: July 27, 2010, 10:25:59 AM »
Ok off of the sator stuff and back to my problem of what headlight to put on this butcher up bastard child.
The stock Vision headlight is still in the running, but what do you think of this one?
I like it more and more.
The scale is right on. It kinda follows the lines of the frame from the side. It also has a flat spot on top for my digital gauge panel.
I stuffed it with packing paper to kinda hold it in place.

Ok let me have it. Yea ;D or nay  :-[

I will buy you a beer if you know what model this light came off of.....

Raj1988

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #107 on: July 27, 2010, 10:46:41 AM »
I LIKE IT. looks like a one of them small honda mopeds from th 60;s
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QBS

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #108 on: July 27, 2010, 11:30:58 AM »
Well John, it's not as "flat out ugly" as the previous candidate.  But, I'm still rooting for either a large round unit or the stock unit.  It might help us if we knew what your plans were for the paint scheme.  Will the frame be painted and if so, will the tank be painted to match?
« Last Edit: July 28, 2010, 12:52:25 AM by QBS »

supervision

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #109 on: July 27, 2010, 08:41:51 PM »
 I like the dream lite, you got the rest, is the bulb easy?
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QBS

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #110 on: July 28, 2010, 12:55:06 AM »
So SV, you're thinking Honda Dream source.  You must go way way back.  Could be a good call.  No doubt John will reveal all in good time.

fret not

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #111 on: July 28, 2010, 01:28:22 AM »
Looks like CA 77 or 72 to me too.  Not a first choice if any night riding is in the cards.
Retired, on the downhill slide. . . . . . . . still feels like going uphill!

supervision

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #112 on: July 28, 2010, 07:31:57 AM »
 Yea, QB, I remember when the Dead Sea, was only Sick
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johnclemens

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #113 on: July 28, 2010, 11:59:02 AM »
You guys are close. I'm impressed. Honda CA-95 (150 Dream)

I like it! I think its going to be the one. I will modify it a bit, but I like the look and scale.
I can get the glass on ebay. Also I will modify it to fit a H4 bulb. I really don't plan on doing any night riding other than home from some bike event.... I don't do allot of night riding on any of my bikes anyway. Cept when I'm touring and thats not going to be on this rig.

I tried some round ones. It just doesn't look right. And the Vision stocker is just a bit too big.

The small round one would work. But I just don't care for it.
The big round one is horrible.

QBS

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #114 on: July 28, 2010, 05:19:44 PM »
John, I got looking at your bike and the thought came to me that if you're running the stock radiator, the addition of the stock radiator shroud might help the look of the bike.  Sort of give it a sleeper stock look and hide its' race track roots.
« Last Edit: July 28, 2010, 05:22:41 PM by QBS »

johnclemens

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #115 on: July 28, 2010, 06:16:26 PM »
Insert Quote
John, I got looking at your bike and the thought came to me that if you're running the stock radiator, the addition of the stock radiator shroud might help the look of the bike.  Sort of give it a sleeper stock look and hide its' race track roots.

I agree, check out page 4 of the post....
Its just off right now. It may not work though, the forks hit on it at full turn. After I install some steering stops though it might work out.
I'll have to wait till the front end is complete. I may change the radiator yet.

johnclemens

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #116 on: August 30, 2010, 03:05:07 PM »
Not much work on the Vision lately as I've been enjoying summer.
Did a track day yesterday on my Ducati.
Check out my video....
http://www.youtube.com/watch?v=-ULQw6sOlek
That supermoto that passes me holds the lap record I've be told.

Rikugun

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #117 on: August 30, 2010, 03:44:03 PM »
Cool video. It's amazing how a little supermoto thumper can make a big bore sportbike look silly in the twisties.
It is far better to grasp the universe as it really is then to persist in delusion, however satisfying or reassuring.  Carl Sagan

johnclemens

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #118 on: August 30, 2010, 03:53:57 PM »
Also its a 20 year old Ducati on 2 year old street tires.
Piloted by a 45 year old, out of shape guy who has to work on monday.

The supermoto is on racing slicks and has a fearless 17 y/o at the controls...

Rikugun

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Re: Build thread on my Yamaha XZR650 racebike to a street bike.
« Reply #119 on: August 30, 2010, 03:59:58 PM »
Understood, and my comment was in no way a slight to you or the Duck.

Still, all things being equal, the lighter SM will probably spank the larger sport bikes.
It is far better to grasp the universe as it really is then to persist in delusion, however satisfying or reassuring.  Carl Sagan