S4 idle issue - Page 5

Darren69 · 04-09-2021, 02:10 AM

Quote:

Originally Posted by Terryphukwit

That's a very long explanation about nothing, its obvious they are copies but that is what pattern parts are, i'm almost tempted to buy one to see what you get out of interest..

I think the point he's making is that if you expect the cheap FH020AA ones to be MOSFET then they most likely won't be.

Terryphukwit · 04-09-2021, 12:24 PM

So just purely out of interest I have bought one of the cheap Chinese RRs
https://www.ebay.co.uk/itm/373672205673
it is the cheapest one I could find, it calls itself an upgrade and the word mosfet is used repeatedly, this is only a few £s more than i paid for a connector kit. Lets find out what you get!!

slob · 04-09-2021, 12:35 PM

the 'For' at the front of the description is the first clue...

I guess how hot it gets will tell you whether it's a FET or shunt

Darren69 · 04-09-2021, 02:36 PM

I did spot some like this one which has all the indication of being a MOSFET , according to the video, eg the tooling marks and the stainless back plate are present:-

https://www.ebay.co.uk/itm/174562636...gAAOSwjQRf22hi

It's still really cheap as the genuine ones are a lot more money.

Terryphukwit · 08-09-2021, 05:28 PM

So, Chinese RR has arrived, actually arrived yesterday so was very quick, this is more than i can say for the other one I ordered which was out of stock and is now on back order.

Is all fitted and working well, the connectors came with it and are annoyingly exactly the same as the set i ordered separately that cost almost as much. Regulator is not mosfet, it would be hard to believe that for £14 plus VAT "came with a VAT receipt" it would be, what I can say is that it works fine, gives a very constant 14.5 to 14.6v which I am monitoring with a voltmeter on the bike. the bike now idles well at 1100rpm which I had at 1600 before to try to sidestep the stalling. The bike appears much happier now even when temp is at 104 and the fans are running. I have fitted it at the front of the frame just inside behind the head stock so will have plenty of air to cool it, ill add some pics of the finished install when i take them and will report back if it explodes..

Terryphukwit · 08-09-2021, 05:40 PM

jerry · 09-09-2021, 04:35 PM

I had a cheap Chinese one like that 3 years ago but after a month it blew up and when chopped up it was not MOSFET but just a shunt rectifier inside ,,,,,hope you have better luck longterm ...I now have a proper shindengren one

alan s4 · 10-09-2021, 10:58 AM

As above, I had a non MOSFET fitted as a replacement and it went on fire whilst I was riding, not something I would recommend even as an "experiment".

I recently bought a used FH020AA unit for my 996. They are now fitted as standard to Multistrada's, I picked mine up for less that 50 quid.

04-09-2021, 02:36 PM	#64
Darren69 Transmaniacon MOC Join Date: Sep 2013 Location: Sutton In Ashfield Bike: Multiple Monsters Posts: 6,022	I did spot some like this one which has all the indication of being a MOSFET , according to the video, eg the tooling marks and the stainless back plate are present:- https://www.ebay.co.uk/itm/174562636...gAAOSwjQRf22hi It's still really cheap as the genuine ones are a lot more money. __________________ Roast Beef Monster! Termignoni and Bucci - Italian for pipe and slippers! S4 Fogarty, S4R 07T, 748, Series 1 Mirage

09-09-2021, 04:35 PM	#67
jerry Old Git Join Date: May 2006 Location: Cricklade Bike: Multiple Monsters Posts: 2,803	I had a cheap Chinese one like that 3 years ago but after a month it blew up and when chopped up it was not MOSFET but just a shunt rectifier inside ,,,,,hope you have better luck longterm ...I now have a proper shindengren one __________________ MONSTERMAN

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04-09-2021, 12:24 PM	#62
Terryphukwit Registered User Join Date: Jul 2021 Location: Canterbury Bike: S4 Posts: 75	So just purely out of interest I have bought one of the cheap Chinese RRs https://www.ebay.co.uk/itm/373672205673 it is the cheapest one I could find, it calls itself an upgrade and the word mosfet is used repeatedly, this is only a few £s more than i paid for a connector kit. Lets find out what you get!!

04-09-2021, 12:35 PM	#63
slob . Join Date: Jul 2003 Location: East London Bike: Multiple Monsters Posts: 9,707	the 'For' at the front of the description is the first clue... I guess how hot it gets will tell you whether it's a FET or shunt

08-09-2021, 05:28 PM	#65
Terryphukwit Registered User Join Date: Jul 2021 Location: Canterbury Bike: S4 Posts: 75	So, Chinese RR has arrived, actually arrived yesterday so was very quick, this is more than i can say for the other one I ordered which was out of stock and is now on back order. Is all fitted and working well, the connectors came with it and are annoyingly exactly the same as the set i ordered separately that cost almost as much. Regulator is not mosfet, it would be hard to believe that for £14 plus VAT "came with a VAT receipt" it would be, what I can say is that it works fine, gives a very constant 14.5 to 14.6v which I am monitoring with a voltmeter on the bike. the bike now idles well at 1100rpm which I had at 1600 before to try to sidestep the stalling. The bike appears much happier now even when temp is at 104 and the fans are running. I have fitted it at the front of the frame just inside behind the head stock so will have plenty of air to cool it, ill add some pics of the finished install when i take them and will report back if it explodes..

08-09-2021, 05:40 PM	#66
Terryphukwit Registered User Join Date: Jul 2021 Location: Canterbury Bike: S4 Posts: 75

10-09-2021, 10:58 AM	#68
alan s4 Registered User Join Date: Sep 2013 Location: Glasgow Bike: S4 challenge Posts: 447	As above, I had a non MOSFET fitted as a replacement and it went on fire whilst I was riding, not something I would recommend even as an "experiment". I recently bought a used FH020AA unit for my 996. They are now fitted as standard to Multistrada's, I picked mine up for less that 50 quid.