Kicking the reg/received hornets nest....

[mvalenti]

I understand the opinion of the group is get the sh-775 and be done with it. But what about others of this style, mosfet. I see a few for similar size bikes going for less $. What magic inside makes the sh-775 so desirable?

[Steve]

Not so much what's inside, it's how what's inside works.

Yes, MOSFET is an improvement over the original type of transistors, but they still shunt any excess current directly to ground without reducing the current that the stator is producing. This means that the stator is producing as much power as it can, all the time.

The SH775 and the Compufire are series-type regulators. Instead of merely diverting current, it interrupts it. This reduces the average current through the stator, extending its life.

Go ahead, get the cheaper R/R, but be prepared to spend your saved money on another stator (or two) (or three).

.

[mvalenti]

My mistake, I forgot SH-775 was a series, and NOT a mosfet....

[greg78gs750]

personally, i think if you connections are all tight and clean and everything is 100%, you are unlikely to have any problems with a mosfet reg rec. just my opinion. having said that, i recently switched a perfectly good mosfet for a 775......

[posplayr]

I just love personal opinions on sparks and magic.

[Steve]

I just love personal opinions on sparks and magic.

They seem to be followed by sparks and worn-out shoes.

.

[greg78gs750]

hornets nest indeed lolz. the 2 gs's i have owned are both on their original stators after 30 years of no series reg/recs. but no question the series is "better".

[posplayr]

hornets nest indeed lolz. the 2 gs's i have owned are both on their original stators after 30 years of no series reg/recs. but no question the series is "better".

I would have thought it common knowledge by this time that the likelihood of having a stator burn up using a SHUNT R/R is a function of the size of your bike and how you ride it. Larger bikes get hotter and are more likely to burn the stator. Running higher RPM at lower speed makes it more likely to burn as well. High speed and lower RPM less likely.

All that is irrelevant if you have a SERIES R/R.

[mvalenti]

After a little more reading, it seams the few series style reg/rec are all within range of one another with regard to pricing. The lower end models seem to be the mosfet type or labeled "solid state"... Or my favorite, "rugged design".... Thanks again for the replies.

[Grimly]

After a little more reading, it seams the few series style reg/rec are all within range of one another with regard to pricing. The lower end models seem to be the mosfet type or labeled "solid state"... Or my favorite, "rugged design".... Thanks again for the replies.

Hmm... yeah; and if you're looking for a used one be sure to get a genuine SH-775 from a Polaris vehicle breaker who actually shows the SH-775 marking on the end of it. The price of a new (genuine, series, Polaris/Shindengen) one is so low it's hardly worthwhile buying a new one of any other type. There are unscrupulous sellers all over ebay and the like who misrepresent MOSFETs R-Rs as being the same as the Polaris fitting with listings that keyword-salt the Polaris part number, but they're clever enough to not actually claim these are actually series or SH-775s.
All in the wording - watch out.

[posplayr]

After a little more reading, it seams the few series style reg/rec are all within range of one another with regard to pricing. The lower end models seem to be the mosfet type or labeled "solid state"... Or my favorite, "rugged design".... Thanks again for the replies.

I though I would clarify some of your misunderstandings as evidenced above:

There is a summary of regulators in a thread in my signature "GS Stator" but in short:

1.) There is a two to one range in cost of SERIES R/R's the SH-775 the cheapest the Compufire the most expensive.

2.) I don't know of any regulators for motorcycles (after 1970) that are not "solid state". The new relays to get are all SERIES. Shunt R/R 's known as "MOSFET" are still SHUNT r/Rs using MOSFETs. The Compufire is a SERIES R/R using MOSFETs. The cheapest SERIES is the SH-775 which uses SCRs like the old traditional SHUNT R/Rs (like OEM).

3.) The biggest improvement between various GS OEM R/R's was going from a single SCR on one stator leg to as many as three SCR's on all three legs. This technological leap from 1 SCR to 3 SCR's is where Electrosport got their original claim to fame with what is now decades ago.

[mvalenti]

I though I would clarify some of your misunderstandings as evidenced above:

There is a summary of regulators in a thread in my signature "GS Stator" but in short:

1.) There is a two to one range in cost of SERIES R/R's the SH-775 the cheapest the Compufire the most expensive.

2.) I don't know of any regulators for motorcycles (after 1970) that are not "solid state". The new relays to get are all SERIES. Shunt R/R 's known as "MOSFET" are still SHUNT r/Rs using MOSFETs. The Compufire is a SERIES R/R using MOSFETs. The cheapest SERIES is the SH-775 which uses SCRs like the old traditional SHUNT R/Rs (like OEM).

3.) The biggest improvement between various GS OEM R/R's was going from a single SCR on one stator leg to as many as three SCR's on all three legs. This technological leap from 1 SCR to 3 SCR's is where Electrosport got their original claim to fame with what is now decades ago.

Thank you for the explanation, I think I was confused reading prior posts. That and shifty reading comprehension, I understood it as shunt style was junk, and series was the way to go.

[posplayr]

Thank you for the explanation, I think I was confused reading prior posts. That and shifty reading comprehension, I understood it as shunt style was junk, and series was the way to go.

There is a lot of interpretation and mis information posted on the internet. The only way to keep it clean is to police the information; at least people around here try to do that. It can even be interpreted as argumentative, but it only takes a few unchecked comments to start a whole wave of misunderstanding.