Stator Failure Prevention - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 26 (permalink) Old 06-04-2012, 01:29 PM Thread Starter
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Stator Failure Prevention

Hey all,

After ignoring all the advice I received about doing the tuxedo stator mod while the engine was out, the inevitable has happened.

For whatever reason, I figured I'd be impervious to a stator failure. I was wrong. Although the stator tested fine and the voltage was correct then the bike was fired up, it was not OK.

Once the bike warmed up the voltage dropped significantly, and could not charge the bike sufficiently. I'm assuming It's grounding out when hot, I have yet to confirm this with ohm measurements.

Anyhow, I'm looking at an engine pull to replace the stator. (Possibility of a new video to document the procedure )

I'm also considering mods that will prolong the life of the stator.

Either an oil cooling system, or a stator oil bath mod. Maybe a combination of both.

The oil cooling system would use an oil filter adapter and a frame mounted oil cooler. The system would probably cost around $400.00.

I'm having a hard time justifying a cost like that if the stator only fails so often, and is easily serviced with the cover mod.

What do you guys think?

Street
1985 VN750 Acquired Feb, 2011 - 13,676km
Mods - Ear Shave, Pickup Coil Gap, Drilled Clutch Basket, Shift Tie Rod, Mosfet R/R, MF Battery, De-Goated (H-Pipe), MCCT, Heated Grips, Plexistar 2 Windshield

Dirt
2004 KTM SX 125 - 1979 Can-Am Qualifier 250 - 1971 Kawasaki F6

Video Tutorials - Engine Rebuild - Fork Seal Replacement - Grease Swing Arm Bearings - Carb Rebuild - Spline Lube - Refilling Rear Shocks - Grease Steering Bearings
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post #2 of 26 (permalink) Old 06-04-2012, 01:51 PM
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From everything I have read, moving to a MOSFET regulator can greatly improve stator life.

Also, get your stator rewound from Tim Parrot as the quality of work is much better than even OEM. I am really happy with mine! My battery was 13.06v after my 2 hour ride yesterday. The stator case modification is totally worth it, saved me a ton of time. I can swap a stator in under an hour if the gasket is working with me now. If you can come up with a way to keep that stator from going out in the first place, that would be awesome.

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 #3 of 26 (permalink) Old 06-04-2012, 01:56 PM Thread Starter
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Quote:
Originally Posted by thtanner View Post
From everything I have read, moving to a MOSFET regulator can greatly improve stator life.

Also, get your stator rewound from Tim Parrot as the quality of work is much better than even OEM. I am really happy with mine! My battery was 13.06v after my 2 hour ride yesterday. The stator case modification is totally worth it, saved me a ton of time. I can swap a stator in under an hour if the gasket is working with me now. If you can come up with a way to keep that stator from going out in the first place, that would be awesome.
I have the Mosfet, and I will get Tim to re-wind mine.

I'm just brainstorming failure prevention right now.

I've dug up a bunch of old post with lots of ideas. I just need to weigh the logistics and costs of these mods.

Street
1985 VN750 Acquired Feb, 2011 - 13,676km
Mods - Ear Shave, Pickup Coil Gap, Drilled Clutch Basket, Shift Tie Rod, Mosfet R/R, MF Battery, De-Goated (H-Pipe), MCCT, Heated Grips, Plexistar 2 Windshield

Dirt
2004 KTM SX 125 - 1979 Can-Am Qualifier 250 - 1971 Kawasaki F6

Video Tutorials - Engine Rebuild - Fork Seal Replacement - Grease Swing Arm Bearings - Carb Rebuild - Spline Lube - Refilling Rear Shocks - Grease Steering Bearings

Last edited by Roach; 06-04-2012 at 06:32 PM.
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post #4 of 26 (permalink) Old 06-04-2012, 02:12 PM
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Out of curiosity, what kind of R/R was it, was it new, and how long did it last?

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 #5 of 26 (permalink) Old 06-04-2012, 04:44 PM Thread Starter
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It's a Shindengen MOSFET R/R. It's practically brand new, I'm assuming it's still good.

Street
1985 VN750 Acquired Feb, 2011 - 13,676km
Mods - Ear Shave, Pickup Coil Gap, Drilled Clutch Basket, Shift Tie Rod, Mosfet R/R, MF Battery, De-Goated (H-Pipe), MCCT, Heated Grips, Plexistar 2 Windshield

Dirt
2004 KTM SX 125 - 1979 Can-Am Qualifier 250 - 1971 Kawasaki F6

Video Tutorials - Engine Rebuild - Fork Seal Replacement - Grease Swing Arm Bearings - Carb Rebuild - Spline Lube - Refilling Rear Shocks - Grease Steering Bearings
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post #6 of 26 (permalink) Old 06-04-2012, 05:45 PM
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Other than keeping all your electrical connections clean and solid, the only factor that seems to have an effect on stator life is oil level. Not alot of data here, but it is generally believed keeping the engine oil level at the very top of the sight glass is good prevention.

If You Are Not Sure If I Am Joking or Not....I AM !!Photos:
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post #7 of 26 (permalink) Old 06-04-2012, 06:00 PM
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Quote:
Originally Posted by Knifemaker View Post
Other than keeping all your electrical connections clean and solid, the only factor that seems to have an effect on stator life is oil level. Not alot of data here, but it is generally believed keeping the engine oil level at the very top of the sight glass is good prevention.
^ x2 ^

Diagnose and repair anything that makes the engine run hotter than normal.

Not sure if a MOSFET R/R helps with stator life. It is still a ground shorting type regulator. It just doesn't use a bi-polar resistive junction to do it.

~~C8>

Last edited by ZCraggRatt; 06-04-2012 at 06:05 PM.
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post #8 of 26 (permalink) Old 06-04-2012, 06:32 PM
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as for cooling the stator.. some one made an oil injection system by tapping into the already used chrome oil line and running another line into the stator cover... can't remember who it was. GORDON... do you have it book marked by any chance?
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post #9 of 26 (permalink) Old 06-04-2012, 06:49 PM Thread Starter
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Quote:
Originally Posted by slimvulcanrider View Post
as for cooling the stator.. some one made an oil injection system by tapping into the already used chrome oil line and running another line into the stator cover... can't remember who it was. GORDON... do you have it book marked by any chance?
Yeah, I've looked that thread over. It's really neat.
The Thread
The Pictures

Edit: I just realized this thread probably should have been under Electrical.

Street
1985 VN750 Acquired Feb, 2011 - 13,676km
Mods - Ear Shave, Pickup Coil Gap, Drilled Clutch Basket, Shift Tie Rod, Mosfet R/R, MF Battery, De-Goated (H-Pipe), MCCT, Heated Grips, Plexistar 2 Windshield

Dirt
2004 KTM SX 125 - 1979 Can-Am Qualifier 250 - 1971 Kawasaki F6

Video Tutorials - Engine Rebuild - Fork Seal Replacement - Grease Swing Arm Bearings - Carb Rebuild - Spline Lube - Refilling Rear Shocks - Grease Steering Bearings
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post #10 of 26 (permalink) Old 06-04-2012, 06:57 PM
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Quote:
Originally Posted by Roach View Post
It's a Shindengen MOSFET R/R. It's practically brand new, I'm assuming it's still good.
I meant what brand stator, not R/R. My bad

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
thtanner is offline  
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