Alternative to the SH775 RR

[Houndawg76]

I was wondering if anybody has tried a R/R from a later model motorcycle. The reason I am asking this there is a motorcycle salvage yard going out of business close to me, and one of the things they advertised was R/R's for a cheap price. Just curious if going this route can cause more problems than benefits. I'm not sure what kind of bike to look for, but I was thinking something off a touring bike since they can handle more loads than what's on my bike (1982 GS850L).

 

[IanC]

Might check here:
http://www.thegsresources.com/_foru...r-Regulator-replacement-list&highlight=mosfet

 

[Joe Garfield]

I got my SH775 used on eBay from a guy/place that sells parts stripped from Polaris machines.

We know the SH775 works great, why risk something else? Mine system (with a new stator) actually charges the battery at idle and works great.

 

[posplayr]

You can read GS Stator in my signature

 

[Gorminrider]

I was wondering if anybody has tried a R/R from a later model motorcycle. The reason I am asking this there is a motorcycle salvage yard going out of business close to me, and one of the things they advertised was R/R's for a cheap price. Just curious if going this route can cause more problems than benefits. I'm not sure what kind of bike to look for, but I was thinking something off a touring bike since they can handle more loads than what's on my bike (1982 GS850L).

Most here are pretty pleased with their fancy 775s and you can research why but to answer your question,

Sure. Its pretty easy to adapt them.( Edit: unless they are field coil regulation type...look for one used on 3 phase PermanentMagnet generators like ours..)
...They often have an extra sense wire. Best to Put this on the key-switched or some other circuit that reflects the main battery voltage pretty well( not the headlamp circuit as an example) ..ie best if not directly on battery, though it'll work...

I don't llike things that run hot so put your hand on the funky R/R while running it a bit...if Very hot, try to keep it cool out in the breeze and it might last longer.

 

[rustybronco]

but I was thinking something off a touring bike since they can handle more loads than what's on my bike (1982 GS850L)

The limiting factor is the stator. It is only capable of outputting so many watts. You can improve the R/R but it will do little to improve the output of the stator.

 

[Nessism]

Ebay: Search "polaris RZR regulator". You will find tons of used SH775's for about $40 shipped. At that price point there is no good reason to use anything else.

 

[posplayr]

Ebay: Search "polaris RZR regulator". You will find tons of used SH775's for about $40 shipped. At that price point there is no good reason to use anything else.

We see these questions so often, "...why should I do the exact same as what everybody else if doing, knowing full well it works?"

I'm not going to say these are stupid, questions because they are not. The issue is who should answer the question? This is because in reality the question is
" can somebody explain why the common knowledge is wrong?"

Now I ask myself the exact same thing constantly, the difference is I can usually find the answer without asking anybody the question but rather just reading.

 

[Joe Garfield]

...maybe another way to ask the original question: Is the SH775 on any machines that might be in his local scrap yard?

 

[Nessism]

We see these questions so often, "...why should I do the exact same as what everybody else if doing, knowing full well it works?"

I'm not going to say these are stupid, questions because they are not. The issue is who should answer the question? This is because in reality the question is
" can somebody explain why the common knowledge is wrong?"

Now I ask myself the exact same thing constantly, the difference is I can usually find the answer without asking anybody the question but rather just reading.

On KZ Rider the brethren don't even know what a SH775 (or series R/R) even is. I've tried to explain to them that they help protect the stator from shunted current over heat failure but their eyes just glaze over. Thing is, KZ bikes only have about 25% of the stator failures as GS bikes. I think this relates to those bikes having a lower output stator, so there is less excessive power being shunted back to the stator. Reason for mentioning this is because people that may have been brought riding non-GS bikes may not recognize the need for a series R/R.

 

[posplayr]

...maybe another way to ask the original question: Is the SH775 on any machines that might be in his local scrap yard?

Yea, not clear if he is looking for something newer, something cheaper, something different.

 

[Houndawg76]

Here is the reason I brought up this question- I read the notes presented in this forum, and they mentioned I should be able to get a SH775 for less than $100. I went out on the links provided in the threads, and the cheapest new one I could find was almost $150. They seem to have made a large jump in price in the last 2-3 years. I did find the used ones on ebay for $40, but the pictures of them showed them covered in mud. I'm presuming they're a hardy unit, but I didn't want to plunk down my money and find out it's no good because it's been waterlogged. I'm not wanting to stir up the pot, but the reason I'm asking is there are a couple of motorcycle/ATV salvage yards within an hour of my house, and if there's any alternatives to the SH775 I was wanting to find out what others had used and what problems they ran into going this route or if the bike was problem-free. I am still using the original RR with a stator that's been in the bike for a couple of years, and the only thing I plan on adding to it is aux. LED lighting.

 

[Nessism]

Here is the reason I brought up this question- I read the notes presented in this forum, and they mentioned I should be able to get a SH775 for less than $100. I went out on the links provided in the threads, and the cheapest new one I could find was almost $150. They seem to have made a large jump in price in the last 2-3 years. I did find the used ones on ebay for $40, but the pictures of them showed them covered in mud. I'm presuming they're a hardy unit, but I didn't want to plunk down my money and find out it's no good because it's been waterlogged. I'm not wanting to stir up the pot, but the reason I'm asking is there are a couple of motorcycle/ATV salvage yards within an hour of my house, and if there's any alternatives to the SH775 I was wanting to find out what others had used and what problems they ran into going this route or if the bike was problem-free. I am still using the original RR with a stator that's been in the bike for a couple of years, and the only thing I plan on adding to it is aux. LED lighting.

Message the ebay seller and ask them to confirm the unit has "SH775" imprinted on the top and that they offer a guarantee. If so, then you are safe to order. The SH775 is made by Shindengen, the largest maker of motorcycle R/R's to the OEM bike companies. They are uber robust so don't worry about a little mud. They are seal units. Only other thing you may need is a harness plug. Triumph sells a nice one. Search the forum here and you can find the part number.

 

[Steve]

It's not so much because the SH775 "can handle larger loads", it's HOW it handles LIGHTER loads.

It has a different design that lowers the average current through the stator when supply exceeds demand. With the stock R/R and virtually all of the "heavy duty touring model" R/Rs that you will find in the scrapyard, the output is shunted back through the stator to regulate voltage. The stator is ALWAYS making maximum current, regardless of load. Actually, if you want to increase the life of your stator and R/R, add more lights, heated vest, whatever you can to increase the load to the point that the R/R never goes into regulation mode. Your stator will still be maximum current, but it will all be used.

The SH775 regulates by interrupting the current, rather than sending it back through the stator. This lowers the average current through the stator at less-than-maximum loads.

Don't worry about a bit of mud on the used unit. They are waterproof, you can hold it under the faucet and brush the mud off before you install it on your pristine bike.

.

 

[Houndawg76]

Steve-

That's the info I was looking for. I really appreciate your explanation of the differences between the two rectifiers. I'll go out and look for one those.

Nessism-

I've never dealt with ebay before, but I've got a sister who has purchased stuff thru them. I'll look out there and see what I can find.

Sorry if it appeared I was causing hate and discontent, but I wanted to make sure I was making the right decision when I upgrade the charging system.

 

[Joe Garfield]

The one I got was dirty. I cleaned it off and it looked practically new, and works just fine.

 

[1948man]

Ebay: Search "polaris RZR regulator". You will find tons of used SH775's for about $40 shipped. At that price point there is no good reason to use anything else.

Is model 4012941 the only one that is suitable for my gs 1100 shafties?

 

[JTGS850GL]

It's the only Polaris part number for the SH775 R/R.

 

[1948man]

Thanks, snagged one of ebay.

 

[1948man]

http://triumphparts.calmoto.com/productSearch.aspx?searchTerm=T2500676

So, this is what I need to link it up?