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Post by joneill4 on May 23, 2008 18:08:12 GMT -5
My regulator/rectifier is only a rectifier. The headlight that came with the bike lasted most of the riding season last year at 17v. The one I bought at the auto parts store didn't last a week. I've seen rect/regs from time to time on ebay, but they are rare enough that I usually can't afford them. Could I add a regulator to the system? How many amps does the lighting circuit have?
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Post by stevec5000 on May 23, 2008 18:23:57 GMT -5
So your regulator is shorted out? That's not good for long lamp life. The Clymer manual says the output of the alternator is 11 amps but the regulator is good for 15 amps which is rather low so I would think the regulator from just about any newer bike with a permanent magnet alternator might work although I haven't tired any other ones myself so I can't say for sure. I do know that an automotive type regulator won't work since the SR doesn't have a field coil that takes battery current so the regulator from another Yamaha like an XJ650 or XS750 or XS1100 won't work either. I don't know how it compares with the ones on ebay but PartsNMore has replacements for $99. Maybe someone on here know of an inexpensive replacement? www.partsnmore.com/cat_index.php?model=ttxtsr500&category=electrical |
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Post by stevec5000 on May 23, 2008 18:29:48 GMT -5
There's one on ebay for $50, Item number: 160179524886.
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Post by joneill4 on May 24, 2008 7:21:18 GMT -5
Ahhhhhh, I get it. I replaced my fried rec/reg with a rec/reg from an XS400. By the way, what is the green wire for on the XS rec/regs for? I've got it taped off.
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Post by stevec5000 on May 24, 2008 11:03:00 GMT -5
The green wire goes to the field coil in the XS400 alternator to energize the magnetic field. An XS400 regulator won't work on an SR so you need to get the correct kind.
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Post by aero on May 25, 2008 5:59:08 GMT -5
Automotive reg/rects work on the XS650 OK, but as Steve says the SR generator is a totally different animal.
Try also a Honda 250 super Dream item, I think this could be made to work on the SR500.
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Post by chew652 on May 25, 2008 9:29:14 GMT -5
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Post by chew652 on May 25, 2008 9:31:23 GMT -5
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Post by joneill4 on May 25, 2008 10:50:03 GMT -5
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Post by stevec5000 on May 25, 2008 13:01:58 GMT -5
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Post by joneill4 on May 25, 2008 20:35:55 GMT -5
Because of the field coil, or some other reason?
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Post by stevec5000 on May 25, 2008 20:40:23 GMT -5
That's designed for something like a dirt bike that didn't have a regulator. Why not just get the proper one?
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Post by wotavidone on May 26, 2008 0:19:23 GMT -5
It would be ideal to get the proper one, but if you just don't have the bucks for a proper one, a reasonable facsimile of a proper one can be made from half a dozen diodes, a zener diode, a resistor and a decent size transistor.
You need the 6 diodes to provide the rectifier bit for the three phase alternator then the zener diode, resistor and transistor for the regulator bit.
Here in OZ it would cost about $A30. The hardest part for me would be making it in a package small enough to fit where the original goes.
Right now I'm feeling a touch frustrated - I've signed up for broad band internet at home, and if it was all up and running, I'd post the circuit, etc. Unfortunately can't do so over my work internet.
This is something I feel kinda strongly about - bike electronics in the 70's and 80's were fairly basic, and it's should not be beyond us to go the DIY route - Once you know what the circuit is, it never ceases to amaze me how simple it was. I reckon that's the real reason things are usually encased in resin, so you can't see how simple it really is.
Mick
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Post by joneill4 on May 26, 2008 13:09:02 GMT -5
I know it does'nt sound like much, but I honestly don't have $50.
No worries Mick, I already have a schematic. Now the rectifier from the XS400 works fine, Im looking to add a regulator to the system as cheaply as possible. It just can't be that hard.
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Post by wotavidone on May 26, 2008 17:26:52 GMT -5
Mate, if you have the rectifier bit sorted, i.e. your 3 phase AC is now a single DC wire, then I reckon you can probably use that 12V regulator you posted. Looks like you just connect it to your positive wire and ground.
Give it a go mate.
Mick
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