R/R advice - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Electrical
Where does this wire go?
Includes Electrical mods, Lights, Stator,
Rectifier, Diagrams, etc

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post #1 of 11 (permalink) Old 06-03-2014, 06:27 AM Thread Starter
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R/R advice

I'm trying to get a MOSFET replacement for my R/R. When making enquiries, it seems that all the MOSFET units only have 5 wires ( 3 from the stator, +ve and -ve ) I gave the supplier some of the suggestions from this forum, but they only have 5 wires. Is this a big problem? When I study the cct diagram, it seems that I should be able to splice into the +ve wire to create the 6th wire. Does that make sense? Any advice would be very welcome. I'm a technician by trade, so I'm very handy with a soldering iron.

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post #2 of 11 (permalink) Old 06-03-2014, 07:59 AM
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Quote:
Originally Posted by Limeybiker View Post
I'm trying to get a MOSFET replacement for my R/R. When making enquiries, it seems that all the MOSFET units only have 5 wires ( 3 from the stator, +ve and -ve ) I gave the supplier some of the suggestions from this forum, but they only have 5 wires. Is this a big problem? When I study the cct diagram, it seems that I should be able to splice into the +ve wire to create the 6th wire. Does that make sense? Any advice would be very welcome. I'm a technician by trade, so I'm very handy with a soldering iron.
I have an upgraded Mosfet and it works great. All you need are the 3 stator wires plugged in and the hot and ground to the battery. No need to make any changes. I get 13.4 at idle and over 14.2 running. Rectifier also stays cooler.

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
All LED lighting
Upgraded Mosfet rectifier
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post #3 of 11 (permalink) Old 06-03-2014, 09:05 AM
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On the factory wiring, there's a (brown?) 'monitor' wire that isn't used when you change to a MOSFET. This monitor wire senses voltage for the stock r/r. I believe it was in between the positive and negative wires on the plug.

Of course you do need to splice the yellow wire for the headlight relay into one of the stator leads, for the headlight to function normally.

I have a MOSFET and don't have anything spliced to the positive wire going to the battery, it does have a maxi fuse inline.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
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post #4 of 11 (permalink) Old 06-03-2014, 09:18 AM
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Quote:
Originally Posted by Spockster View Post
On the factory wiring, there's a (brown?) 'monitor' wire that isn't used when you change to a MOSFET. This monitor wire senses voltage for the stock r/r. I believe it was in between the positive and negative wires on the plug.

Of course you do need to splice the yellow wire for the headlight relay into one of the stator leads, for the headlight to function normally.

I have a MOSFET and don't have anything spliced to the positive wire going to the battery, it does have a maxi fuse inline.
Have to disagree. All you have to do is tape off the brown wire that is not needed anymore. No need to splice in the headlight relay. Everything will work as normal.

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
All LED lighting
Upgraded Mosfet rectifier
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post #5 of 11 (permalink) Old 06-03-2014, 09:28 AM
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Quote:
Have to disagree. All you have to do is tape off the brown wire that is not needed anymore.
Well, I think that is what I was trying to say.


Quote:
No need to splice in the headlight relay.
Trying to work from memory, but I think I had to splice the headlight trigger. I later clipped it off because I did the bypass. The reason for this splice is because I ran all new wires from the stator to the r/r.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
Repair Manual: http://www.mediafire.com/file/mj7z81..._Catalogue.pdf

Owner's Manual: http://www.mediafire.com/file/nscb5f...ers+Manual.pdf
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post #6 of 11 (permalink) Old 06-03-2014, 09:49 AM Thread Starter
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Thanks for your advice. Much appreciated.

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post #7 of 11 (permalink) Old 06-03-2014, 01:16 PM
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You can just buy a Rick's Hotshot R/R and it'll be plug and play. They're MOSFET now and I have one on my VFR!

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #8 of 11 (permalink) Old 06-03-2014, 01:47 PM
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Quite a few of us use the Mosfet supplied by Roadster Cycle. It is model FH020AA. Jack is a great guy and stands behind his product. Good info on the site. This is a plug and play rectifier.
http://roadstercycle.com/

JM2001

" Loud Pipes Risk Rights "

2001 Vulcan 750
marbled
TOC upgrade on ACCT
Air/fuel mixture set to 2 1/2 out
rectifier relocated
splines lubed
iridiums
decals removed
upgraded mirrors
Pic up coil mod done
degoated
All LED lighting
Upgraded Mosfet rectifier
JM2001 is offline  
post #9 of 11 (permalink) Old 06-03-2014, 02:01 PM
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Quote:
Originally Posted by JM2001 View Post
Quite a few of us use the Mosfet supplied by Roadster Cycle. It is model FH020AA. Jack is a great guy and stands behind his product. Good info on the site. This is a plug and play rectifier.
http://roadstercycle.com/
It isn't plug and play. You have to change the connectors...

He charges a bit much for those, R/Rs though. There are several models that you can find on eBay for around $60. For the effort in changing the wiring connectors, the Rick's Hotshot sounds like a better deal.

Model / Output / Source Bike
FH001 / 35A / FJR 1300
FH008EB / 40A / BR 600 RR
FH010BA / 50A / ZX-10R
FH012AA / 50A / FJR 1300, R1
FH012BA / 50A / ZX-14R, ZR1400, GTR1400
FH014AA / 50A / CBR 1000 RR
FH016AA / 40A / ZX-6R

Our regular R/R is under or at 30amp anyways, so any of the MOSFET based R/Rs look to be an upgrade. I see no reason to shoot for a FH012AA, as the FH010BA (the one I used), and many others, are also 50A. I'd cross reference the bikes years, but that's the basic list.

1986 Kawasaki Vulcan 750
NGK Iridium Plugs #7803/DPR7EIX-9
Duralast Gold ETX15 AGM Battery
Coastered & Shaved
TOC MCCTs
Metzeler ME880 [110/90-19, 170/80-15]
Balance Dampers Replaced
Tuxedo Mod
Rebuilt Forks w/ Progressive Springs
V&H Cruzers
VN750.com Grill Cover
Meanstreak Seat
Emgo 23-92411 Handlebars
MOSFET FH012AA R/R


1990 Kawasaki Vulcan 750

1998 Honda VFR800 FI

2014 Honda VFR800F

1989 Pontiac Firebird Formula 350
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post #10 of 11 (permalink) Old 06-03-2014, 02:23 PM
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I've got a MOSFET sitting in my garage if your interested. The fins are larger so it can't be used in the stick location. I had it mounted under the left side cover.
Shoot me a pm if your interested. It will be alot cheaper than a new one.
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