Frequently asked

About Us


Mosfet R/R universal
mounting brackets

Shindengen FH020AA
universal kit for almost
all 2 and 3 wire stator

Reverse Gearbox for
motorcycle powered
vehicles and Legend cars.

Five wire stator, excited 
rotor regulator build up
Do it yourself project

LED Voltage Monitor

and SH847
mounting dimensions

Stator Testing Example

Easy Mosfet Hookup

Vmax fuel injection
throttle body kit

Vmax CV to TBI

Vmax Microsquirt
and Megasquirt
setup Instructions

'32 Roadstercycle® 
Harley Powered

'34 Roadstercycle®
Vmax Powered




I Ship World Wide

   Guys beware of fake FH020AA and FH012AA R/Rs sold on Ebay and Amazon. Here is my youtube video link that shows what a real FH020AA, and SH847 really look like. Compare my real Shindengen R/Rs to the ones you find and make sure they are real. Don't get ripped off and end up buying twice. Also real FH012AA Mosfets have not been available since right after the Japan Earthquake in 2011. So if anyone says they are selling them as new, they are fake.      (Just copy and paste in your browser.)

I only sell real OEM Shindengen FH020AA and SH847 Regulators.

Home of the Original FH012AA,  FH020AA,  and now the SH847 Upgrade Kits



VFR  6th Gen,  SH847 fits and works great.

New!! 600/750 GSXR LEAD LINKS



USA  Priority mail shipping $6.50,  Includes insurance.
Express Mail International $60.00  (default) Fastest
Priority Mail International $35.00 no tracking with insurance.
Canada, Express Mail International $40.00 (default) Fastest
Canada Priority Mail $25  with insurance, no tracking

Choose shipping method at checkout. Sorry no Russia or Ukraine shipping at this time. 
Remember No insurance or tracking with Priority Mail International.



   Hi Everyone, I try my hardest to give you a great kit but you need to measure to see if 3 feet of 10 gauge battery cable in the stock kits is long enough for your bike. 90% of the bikes it is, check your bike to make sure. Also, the Super kit stator connection wire length is about 12" long,  Is that enough length for your hookup? Measure to be sure. Order more below if needed. Do you need an adapter bracket? Measure your mounting holes and compare them to mine.  Extra sheathing is included with 10 gauge cable add on. GSXR 600 and 750 with the R/R in the front behind the radiator need 1 extra foot of battery cable if you order a Complete kit or Super kit, not the GSXR lead link. GSXR 600/750 Lead links are now available, scroll down the page.  Stator wires do not have polarity so you can hook them up in any order.  Also one other little tid bit, I have people ask me all the time that they have 2 red and 2 green (or black)  wires coming out of the old R/R and what do I do? Some bikes have 2 wires because the Manufacturer needed bigger gauge wire and decided to double up the reds and greens (or blacks) to carry more current.  But if you read my directions you'll find we don't use them anyway in an upgrade kit. The old power plug gets taped off and ty-wrapped safely away. No worries as everything will work just fine.  Just add my pos and neg battery cables to the battery and hook up the stator wires to mine and your done other than mounting the new R/R. Adapter brackets are available below for upgrading to any of my R/Rs. Measure your R/R mounting holes against mine as you probably won't need an adapter bracket.  Also, I'm at the shop pretty much all day now so if you need to call me it's OK.  310.766.5222  Jack

       Shindengen SH847 Series R/Rs  Now available below!!!!!

       YAMAHA FJR  Custom Built Upgrade Harnesses $54.95 Email me.

Battery wire add on has sheathing with it.
Battery wire length add on

Stator wire add on for Super kits only
Stator wire extension kit for Complete kits is down the page.

Click here for FH020AA and SH847 dimensions

Complete Mosfet Kit FH020AA DIY crimp or solder kit!
I have real Shindengen R/Rs. 

Universal  FH020AA Kit with 30 amp Circuit breaker.

 The DIY kit is a crimp or solder complete Mosfet kit with everything you need to upgrade your Sportbike or Cruiser to a Mosfet R/R. Crimping cutting, stripping, soldering, installing heat shrink is all done by you to build your own custom kit. Takes a little time but when you're done you'll have your own customized by you install. Very Cool!!  Custom wire lengths are available. Now with PVC wire sheathing!!  3 feet of battery cable comes with the kit.
Dielectric grease available below!! OK, if this is your first time soldering or your not real good at it, watch my video on soldering. Use thin solder, I use .035 or .040 solder so it flows easily. Make sure your iron on a real hot setting. If you need an adapter bracket to mount the Mosfet easily they are down below, scroll down.  Mosfet dimensions are in the left side index so you can check if it is a direct bolt on replacement or not. Remember that stator leads can go any which way there is no polarity. Also, the wire I use is tin covered copper marine grade wire which solders awesome. It is not aluminum. Also take a look at my LED voltage monitors, they are awesome. Some of my VFR customers have said that 4 feet of battery cable would be better for some years of VFR.  If you need this and 1 foot above in the add on section.



  $128.95 + $7.25 S&H USA
Regulator Option

The Super Mosfet Kit is my #1 selling kit, Fast, Easy and complete.

            The Super Mosfet Kit FH020AA
Easy, fast and complete. As close to plug and play you can get.

FH020AA with Circuit breaker setup, now with PVC wire sheathing!!  I do the crimping and soldering except your 3 stator wires. Ready to go with 3 feet of 10 gauge red/black wiring, 30 amp auto reset circuit breaker or Maxifuse, heat shrinkable butt connections and solder connectors for your choice of hookup to  your stator. Custom wire lengths available. Stator wires are 12" Dielectric grease available below!! If you need an adapter bracket to mount the Mosfet easily they are down below, scroll down.  Mosfet dimensions are in the left side index so you can check if it is a direct bolt on replacement or not. Remember that stator leads can go any which way there is no polarity. Also, the wire I use is tin covered copper marine grade wire which solders awesome. It is not aluminum. Also take a look at my LED voltage monitors, they are awesome. Some of my VFR customers have said that 4 feet of battery cable and 18" of stator wire would be better for some years of VFR.  If you need this add it above in the add on section.

6th Generation VFR needs 4 feet of battery cable, 18 inches stator wire and the 4 way bracket get's it done.  Works with SH847 Stator Saver and FH020AA Mosfet.


 $149.95 + $7.25 S&H

Circuit protection



Click here for the
Easiest Mosfet Hookup suggestion!!!


SH847 series regulator picture     The SH847 is the newest R/R from Shindengen, the same people who built the FH020AA and FH012AA so you know the quality is there. I call it the stator saver as it runs the stator cooler. Great for racing. These are 50 amp peak models that have been tested on the Rotax motored Buell and Aprilia models and have been working great. They have been running these on the 600 Ducati with no issues. I can can make these harnesses any length, check the highlighted areas above for add on wire lengths for battery and stator.  Battery wires are 36" and stator wires are 12" that come in the stock kit. 

    I am only selling SH847 only as a Super kit as this R/R is very expensive and I don't want any issues due to old or bad charging system wiring. I want to make sure this setup is rock solid in every way.  The dimensions of the SH847 are as follows. 1.5" thick, W 4.75" x L 4.75"  Bolt holes center to center 4.0" Bolt holes are 2" from the non-connector side end.

Remember that stator leads can go any which way there is no polarity. Also, the wire I use is tin covered copper marine grade wire which solders awesome.

    Also, if you order a SH847 I bench test them all before they leave the shop.  The SH847 and shipping is expensive and there is no returns so I make sure everyone is solid before I send them.   Suzuki will not accept warranties from me or even their own dealers. So if you buy a SH847 from me you can be sure it's ready to go! 
Also take a look at my LED voltage monitors, they are awesome.

APRILIA Rotax engine models, 5 feet of battery and five feet of stator is what all customers order for these bikes.

6th Generation VFR needs 4 feet of battery cable, 18 inches stator wire and the 4 way bracket get's it done. Did an install at my shop 11-27-17, worked and looked great!

  A lot of people are calling these the stator savers. The series R/Rs do run the stators cooler so in essence they do help with stator heat build up.  All race bikes or track days bikes should have series R/Rs if your unplugging the headlights, not so much for the stator on these but because of the excessive heat build up that happens in the stock shunt type R/R. If you ever watchd a motorcycle race on TV and you see a bike on fire or smoke coming out it's usually a fried R/R.

Here's a PDF file for the SH847 to make a template for fitment.

Make sure you measure after you print it. 100% and shut off automatic scaling worked great for me.  Jack

I make the SH847 easily available to everyone unfortunately Suzuki says all regulator sales are final and no returns. I bench test everyone before they leave my shop to make sure they are working correctly. So be careful installing, do not hook up backwards as it can kill it.



plus $10.50 shipping and insurance.

Circuit protection
  Super harness 30 amp circuit breaker                                                         
Super harness with 30 amp circuit breaker.  $49.95

Comes with both crimp and solder connectors for stator. 3 feet of 10 gauge red/black flexible wire and PVC flexible wire sheathing. The easy way to upgrade your stock harness. Remember that stator leads can go any which way there is no polarity. Stator wires are 12" long. Custom wire lengths available.

Custom Yamaha FJR 1200 harnesses also available. You can order the FJR Harness in the drop down list at the bottom of this window. It has 6 feet of battery cable, 50 amp circuit breaker. Does not come with the stator side because it's not needed. Most FJR riders are saying there's about a 1/2 volt increase at the battery. It does not sound like much but it is. The FJR Harness is $54.95 plus S&H $6.50.

For FH020AA, FH012AA, SH775 and SH847.

 Dielectric grease available below!! Also, the wire I use is tin covered copper marine grade wire which solders awesome. It is not aluminum.

               Custom length add ons available above in the add on section  $49.95 plus $7.25 S&H

Super Harness
Mosfet R/R and connector setFH020AA  Regulator/Rectifier with connector kit.

For the do it yourself quickie wiring hookups. If your stock harness is good and you trust it, this will do the job for a Mosfet or SH775 upgrade.  Do it once and do it right.  Dielectric grease available below!!


$118.95 plus $7.25 S&H 
R/R option
FH020AA Mosfet Regulator/Rectifier

 Mosfet  Regulator/Rectifier  only.
Straight from Shindengen these are the Best selling upgrade R/Rs on the planet. The FH020AA  is what Yamaha uses on a number of their motorcycles. The Yamaha P/N is 1D7-81960-00-00.

Do you need connectors?  If your not replacing an exsisting FH012AA SH775,  or a FH020AA you'll need connectors.


$99.95 plus $7.25 S&H

Connector kit fits all the
FH08AA, FH012AA,  FH020AA, SH775 and the new SH847 series R/R.
These are proprietary connectors and terminals for the above regulators

Dielectric grease available below!!

$19.95 plus $3.00 S&H


Fits the Mosfet, SH775, and SH847 Gray and Black housings.
Free shipping USA 

For making your upgrade even more bullet proof. A lot of people have been requesting this so here it is. This is a 5ml tube which is plenty for anyone of my kits plus enough for many other uses. This is what the car companies put in there tail light and turn signal sockets to prevent moisture and corrosion. 


        .99 cents ea.  Free shipping of course when added with any of my kits.



Includes 3, 3 foot sections of 12 gauge yellow wire and crimp and solder connectors and heat shrink. Ships free and only available with a Mosfet kit or installed when ordering a Super kit with extension purchase. I install it for the least amount of connections.
Also, the wire I use is tin covered copper marine grade wire which solders awesome. It is not aluminum.
Mosfet Kit Add On Only $9.00



YES, these monitors are completely water proof, the little square box I put them in is not sealed but all the electronics are sealed great. NOTE: Do not use headlight or tailight wires for power, goes to the battery or to a fuse in the fuse box that is switch power. Some people have been going straight to the battery posts and let it flash red all the time when the bikes not running for a theft deterent as it looks like an alarm is on.

This is a  HOT item!!! This should be stock from the factory on all motorcycles. .  My new units have been re programmed for either Shorai or stock battery use.  It has the over voltage warning now at 15 volts to warn guard against killing a Shorai battery or boiling a stock battery, best of both worlds in one unit. White case only. I put the LED in the square case with a strip of double sided tape myself for ease of mounting, if you do not want the Led glued into square case so you can drill a hole and mount it in your dash or ? I can do that too.  Just let me know and I will send you just the LED and mounting ring without the square case.  You have to tell me or it will come glued together in a square case.

        $23.95 + 3.00 S&H USA

LED monitor

NEW--- ST Gearbox
$1400.00  plus shipping

     Here is the latest straight through gearbox.  These are custom made by me per order and are about a 2 to 3 week waiting period. I build these myself in the USA. They have a planetary set up with a 1 to 1 in forward and about a 1.5 to 1 in reverse.  I've torqued this configuration up to over 500 lbs with no issues.  So I am rating it at about 200 lbs of torque for a good safety margin.  It's built with motocycle motor powered vehicles in mind.  Since these are a new product all will be sold as experimental units and use at your own risk. I guess that's the disclaimer.  It will come with 2 splined couplers for you to attach your setup to.  You do have to do your own engineering as I'm way too busy building to do extra engineering unless you want to hire me for consulting which I may be open too.  The shafts are 1.25" diameter. Splined or 1/4" keyway is available. The outside covers have 5/16" though holes for bolting the gearbox in. The box is 6" square and the bolt holes are 5" spacing on each corner. $300 deposit through Paypal is acceptable to start a box.  Finished payment will be a Postal money order or cash.  If you would like a unit email me and I will send you an invoice for the $300 deposit.  If you need more info you can call me or email me.  USA only sales for awhile.  Jack

Straight through gearbox


Ok everyone it's been coming for awhile now and we are finally getting ready to get these moving. I tried unsuccessfully for months to find a company in the USA to build these from my design with no luck. So we are finally tooling up to do them oursevles. I am in the process of building up some prototypes and will be selling these to people who want to be test pilots for them. The boxes will be dual 21 tooth sprockets standard and ratios will be changed at your front sprocket or rear wheel gear. The input sprocket will be always 21 or custom bigger and the output can also go bigger. These will be custom order and will have a few week lead time as they will have to be sent out for broaching which I have no time control over. So if you are interested in one of these new units email me to be put on the list. Also the outside sprocket is movable, closer to the  input gear or further out for  wide tire applications. The unit body is about 6" square and about 12" total from end to end.  There will be a couple shifter options for matching your design and mounting configuration needs.  We should be shipping in June.  Any questions just send me an Email.

You tube Video here:

Shaft in shaft reverse gearbox
This is a Fleming Engineering custom design and is in the patent process so please don't think copying our design for resale, it's not in your best interest.


1/2" PVC Sheathing

Sheathing  now comes stock with all my kits, except the series kit  and now I'm making it available for your custom applications too. This is something we all need for our bikes from time to time but it's just not easy to find at a moments notice, and of course if your like me I needed it yesterday. So here it is 1/2" ID. which I find is perfect middle of the road wire covering. Sold by the foot and shipped free its in stock and ready to go. US sales only. Jack
$2.00 a foot with free shipping. 3 Feet  minimum order.

PVC lengths

Crimp and Go kitCrimp & Go Kit $128.95

The newest kit from Jack is the Strip, Crimp & Go. I am not an advocate of using your old harness to upgrade to a Mosfet regulator  but some people need this and who I am to say no. If your harness is on a new bike, or is in tip- top condition then this kit will work great for you. You just cut off your old stator and battery connectors and strip the wires and install the heat shrinkable connectors on your stock wiring making sure you have good solid crimps. There is no directions in the kit. You just strip, crimp and go.  This kit is fast and easy but you have to do it right. 12" wires on both. Remember that stator leads can go any which way there is no polarity. Also, the wire I use is tin covered copper marine grade wire which solders awesome. It is not aluminum.
You can not order extra wire length for the Crimp and go kit.  
Also take a look at my LED voltage monitors, they are awesome.  FH020AA Mosfet only with this setup.


$128.95 + $7.25 S/H




I am now offering a universal mounting bracket for the ShindengenFH010AA, FH012AA,  FH020AA and SH775 regulators.  Also the SH847 bracket is now available.  Comes with bracket and stainless mounting hardware. The bolts I enclose are metric #6 x 1.00 mm counter sunk. These fit most metric bikes. If these are not your size you will have to provide them. I also provide 1/4" threaded mounting bolts and washers for the Mosfet mounting. I personally build each one in my shop on my milling machine  in the USA. These are made with 1/4" aluminum flat bar. You can trim if needed for ultimate weight reduction. The 2 way is 1.5" x 4.00. slotted hole spacing can accept from 1.875" to 3.40" center to center of bolt, spacing. Now also the new Super adapter plate with center hole will let 2006 and 2007 GSXR 600 and 750 owners be able to mount there Mosfet or even a stock R/R around the corner instead of behind the radiator.  It comes with spacer and hardened bolt and locking nut to move the R/R to a better and cooler airflow area. 

Below is the new 06-07 GSXR  600-750  Bracket and hardware. This bracket is new and is experimental so use at your own risk.  I designed this as a simple easy install, the hardened through bolt is better than grade 8. Use removable blue lock tight to install.  If you want to be a test Pilot for me let me know.  I don't have a GSXR so I built it the best and lightest possible for street and racing.  You can mount it 360 degrees if needed.

Gixxer Super bracketMosfet sidewaysMosfet up
GSXR side mount
This is the new GSXR side mount bracket (above)  install on 06/07 600 or 750. Out from behind the radiator out into the air.  The bracket will work with either the 06/07 GSXR lead link found below or any of the Super kits or Complete kits.

Stock mounting   FH020AA only       
$19.95 plus $3.00 S&H

06/07 GSXR side mount  FH020AA only    $23.95  plus $3.00 S&H     

SH847 mounting                               $21.95  plus  $3.00 S&H  

 4 WAY  SH847 / FH020AA   $24.95 plus $3.00 S&H

If you buy a kit and a bracket you will not be charged shipping for the bracket.

Super Brackets

New !!!!

The new SH847 / FH020AA  Universal 4 way bracket is now available.  This is a universal bracket that can mount either the SH847 or the FH020AA in any of 4 different directions. If it's used with a FH020AA you can trim the 2 outer holes off for a tighter fit if needed. I can trim them off for you if you want no charge, just ask. This works on many makes and models including the late model VFRs that need horizontal mounting.  Order above $24.95. plus $3.00 S&H if not ordered with a kit.

Universal Bracket 4 way

Wiring help is here.  and  videos here on

   Triumph T2500676 Harness
 and FH020AA Package for many Triumph models and Ducati models.
Look at the connectors and see if it they will work on your model.

This is a T2500676 adapter harness for a direct plug and play for the Triumph Triple. It may fit other Triumphs a.but you'll have to check your connector ends and see. An avid Triumph owner told me it is the same connector found on a lot of other Triumphs. Also this works on numerous Ducati motorcycles also. Check the forums .The picture of the ends should be a good indication of what it will fit. On some Ducati models the ends plug in but no locking feature. Some guys pull the old plastic connectors off the stock old R/R and put them on the Triumph lead link to get the lock back, others just use a plastic tie wrap. Either way the upgrade is well worth it for the Ducati bikes.  Adapter brackets available above.


$114.95 plus $7.25 S&H USA

R/R option


         $128.95  + S&H =$7.25 USA

This is the new HYOSUNG leadlink package with a 

  FH020AA  Shindengen R/R INCLUDED !! 

     From what I understand this harness will work on about all Hyosung models, but of course you need to match you bikes connectors to my photo to be sure. Be sure before you order.  These harnesses I  build up so the price is a little higher than the Triumph lead link which comes to me assembled. Choose below either the FH020AA which is working on all the Hyosung bikes we have put it on.  If you want to try a SH775 which is still in the experimental stages you can order it but make sure someone has tried it on your make and model, there is no returns on these as they are experimental still.   If your not sure then order the FH020AA it has a great track record and I have them all over the world on a lot of Hyosung models.  The leads are 12" long.   Jack





Choose R/R

GSXR lead link
       2006-2007 GSXR 600/750 Lead link

   This is a custom made by me to help the GSXR 600 and 750 guys easily run a Mosfet or SH775 R/R.  It may fit other Suzuki models and only time and feedback to me will make the list grow. Also available is my adapter plate for moving the R/R around the side away from the hot exhaust.  The leads are about 12" long so side mounting with my bracket is a breeze.  You do not need to order an extra foot of red/black battery cable for a lead link.  $128.95
    FH020AA Mosfet INCLUDED


GSXR 600/750 connectors       Check and match your connectors to the picture on the left. The square hole in the connector is the positive side 2 terminals.  If you have another model Suzuki this may work for you but you have to check and make sure. The black connector is the same as the white connector in the other picture above.

Choose R/R



Yamaha, Kawasaki, Suzuki, Triumph, Honda, Ducati, SV650, Aprilla, Ducati and many more!
Finally fix your single phase 2 wire and three phase 3 wire charging system problems with a new Mosfet voltage regulator upgrade kit!
Even if you buy a Mosfet somewhere else I will help you out with tech support.  
Click here for the
Easiest Mosfet Hookup suggestion!!!
Click here for stator testing page.......
Click here for FH012AA dimensions

All drawings and prints of the Roadstercycles have been copyrighted by Fleming Engineering

The proprietary steering and rear drive is property of Fleming Engineering
With over 14 years invested in the design, we will not take imitations lightly and we will prosecute .

Shindengen is a trademark or copyright of Shindengen America and or other countries.

ROADSTERCYCLE® is a registered trademark owned by Jack Fleming
V-Twin Roadstercycle, V-Four Roadstercycle,  '32 Roadstercycle,  '33 Roadstercycle  
'34 Roadstercycle, are Trademarks of Fleming Engineering/ Jack Fleming

*Harley Davidson and Twin Cam are trademarks of Harley Davidson *
Yamaha V-max is a Trademark of Yamaha Motor Company
Megasquirt is a trademark of Bowling and Grippo

All pictures of the Mosfet and other regulators with applied red and green dots or red and green stripes are Trademarks and Copyright of Jack Fleming / Fleming Engineering and these distinguishing marks are Trademarks applied by Jack Fleming to help customers and to separate other competing and copying websites from pretending to be    4/28/16

Copyright 2007 through 2017  JackFleming/