Further protection for your stator - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 19 (permalink) Old 06-12-2008, 12:39 PM Thread Starter
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Further protection for your stator

With all the new stator replacements going on right now, someone should experiment with an external oil stator cooling solution. When I last changed my stator I routed an oil line off of the pump to spray into the spinning flywheel cavity and cool the stator, but it required a lot of modification. It's been running two years in the Tucson heat with not a hint of heat discoloration on the windings.

A much easier way to do the same thing would be to install a tee in the chromed external oil pipe that supplies the front and rear hydraulic lash adjusters (HLAs) and route that in through the outer generator cover.

1) Cut the chrome external oil pipe just above the oil filler cap.
2) Install a compression tee and record the oil pressure in that line at various RPMs.
3) Remove the outer alternator cover and meticulously measure from two of the mounting screw holes to a point directly between two of the exposed stator windings, such that a stream of oil directed there would spray into the flywheel cavity.
4) Transfer this location to a center punch mark on the outside surface of the outer alternator cover.
5) Drill the outer alternator cover and install a right angle bulkhead-type compression fitting in it with some Yamabond or other suitable sealant.
6) Install a short stub of 1/8" copper tubing on the inner end of the bulkhead fitting to act as a spray nozzle, or use an actual oiler nozzle.
7) Reinstall the outer alternator cover, making sure the added tube and fitting don't interfere with the stator or wiring from the ignition pickups.
8) Route a 1/8" copper line between the tee in the external oil pipe and the bulkhead fitting. (Now would be a good time to temporarily install another tee in the oil pipe to measure the oil pressure in the line.)
9) Run the engine a check for leaks. Test the oil pressure on the external oil pipe, adjusting oil flow through the added tubing if necessary. (I suspect the pressure won't drop because to pump pressure is about 25% above minimum spec at the oil sending unit on my bike, and that's with a 1/8" bypass.)

Chrome tubing and fittings can be used to clean up the appearance, but the above modification can be performed without removing the engine which is a BIG plus.

With the addition of fused stator leads, this should make your current stator outlast the bike.

UPDATE: Oil cooling modification pictures (internal tubing) here: Pictures on Flickr

Edit: On further thought, it may be easer or more robust to tap into the fitting below the oil pressure switch. This is the fitting where the HLA supply lines connect, but would provide more oil volume than teeing off of further down the HLA tubing.

Darrel
'03 Vulcan 750 (90k miles)
-Corbin Seat
-V-Force Windshield
-LeatherLyke Touring Bags
-Chrome Luggage Rack
-Headlight Modulator
-Brakelight Flasher
-MF Battery
-Heads-Up Voltage Monitor
-Replaced Stator (9,000 and 16,000 mi.)
-Oil-cooled Stator Mod (photos)
-Replaced and Relocated R/R
-Greased rear splines
-Fused Stator (photos)
-Metzeler ME880 Marathon 170/80-15 (Rear), 110/90-19 (Front)
-TOC MCCTs installed
-Headlight Relays
SOLD - 2013

Last edited by darrelc5; 04-12-2010 at 09:50 AM. Reason: Added link to pictures
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post #2 of 19 (permalink) Old 06-12-2008, 05:10 PM
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Sounds like a good idea.

But.....
Ya got to update the link for pics in your sig.


AKA: Tim & 'The Adventure Cycle' VROC #24567, NEVROC, SteelCity VROC


"When life throws you curves,
Aim for the apex."

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post #3 of 19 (permalink) Old 06-12-2008, 05:14 PM
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Good idea.

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post #4 of 19 (permalink) Old 06-12-2008, 06:37 PM Thread Starter
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Oh, alright - I knew I'd have to do it some day. Yahoo Photos has been dead for quite a while.

I'll try to get the pictures of my stator mod up on Flickr tonight.

Darrel
'03 Vulcan 750 (90k miles)
-Corbin Seat
-V-Force Windshield
-LeatherLyke Touring Bags
-Chrome Luggage Rack
-Headlight Modulator
-Brakelight Flasher
-MF Battery
-Heads-Up Voltage Monitor
-Replaced Stator (9,000 and 16,000 mi.)
-Oil-cooled Stator Mod (photos)
-Replaced and Relocated R/R
-Greased rear splines
-Fused Stator (photos)
-Metzeler ME880 Marathon 170/80-15 (Rear), 110/90-19 (Front)
-TOC MCCTs installed
-Headlight Relays
SOLD - 2013
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post #5 of 19 (permalink) Old 06-14-2008, 09:39 AM Thread Starter
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Original message in this thread has been updated with a link to pictures of my oil cooling modification. Note that this is not the external tubing method that I proposed above.

Let us know if anyone tries this!!

Darrel
'03 Vulcan 750 (90k miles)
-Corbin Seat
-V-Force Windshield
-LeatherLyke Touring Bags
-Chrome Luggage Rack
-Headlight Modulator
-Brakelight Flasher
-MF Battery
-Heads-Up Voltage Monitor
-Replaced Stator (9,000 and 16,000 mi.)
-Oil-cooled Stator Mod (photos)
-Replaced and Relocated R/R
-Greased rear splines
-Fused Stator (photos)
-Metzeler ME880 Marathon 170/80-15 (Rear), 110/90-19 (Front)
-TOC MCCTs installed
-Headlight Relays
SOLD - 2013
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post #6 of 19 (permalink) Old 05-11-2013, 10:38 AM
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Copper tubing and bathroom fixtures in an engine.
Doesn't look safe.
Hit that the wrong way and you're buying a new engine.
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post #7 of 19 (permalink) Old 05-11-2013, 01:17 PM
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Quote:
Originally Posted by VulcanTwin View Post
Copper tubing and bathroom fixtures in an engine.
Doesn't look safe.
Hit that the wrong way and you're buying a new engine.
Hey Mr. Inteligent, did you notice that you replied to a post from June 14, 2008? I guess we can understand what is behind some of your other recent posts now.

and always remember, "Ride until you rot!"
**Really not sure if the Big "C" is back right now
but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

Tom
Vulcan 2000
New ride: 2009 Victory Vision Arlen Ness Signature Series
4507 miles
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post #8 of 19 (permalink) Old 05-11-2013, 08:22 PM
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Quote:
Originally Posted by Vulcan2000 View Post
Hey Mr. Inteligent, did you notice that you replied to a post from June 14, 2008? I guess we can understand what is behind some of your other recent posts now.
Hope you're having as good a laugh as I am.
Never liked the shadows.
Maybe admin could check this guy's IP address and see
which name he uses when he isn't trashing my thread.
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post #9 of 19 (permalink) Old 05-11-2013, 08:47 PM
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Quote:
Originally Posted by VulcanTwin View Post
Hope you're having as good a laugh as I am.
Never liked the shadows.
Maybe admin could check this guy's IP address and see
which name he uses when he isn't trashing my thread.
Yes I am having a good laugh and it is because of your foolishness. If you are referring to my IP address and suggesting that I am trashing your thread than I will be fully honest and tell you I only use one sign on name and always have since joining. Anything I am willing to post here I will accept responsibility for and not try to hide behind any other name for protection. I know you can not say the same thing. If you really want to have a discussion about anything I have said towards you please send me a PM and I will be sure to respond.

and always remember, "Ride until you rot!"
**Really not sure if the Big "C" is back right now
but having to face the fact that this is a lifetime routine
going forward. Five operations done and it still continues.

Tom
Vulcan 2000
New ride: 2009 Victory Vision Arlen Ness Signature Series
4507 miles
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post #10 of 19 (permalink) Old 05-12-2013, 12:02 AM
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Quote:
Originally Posted by Vulcan2000 View Post
Yes I am having a good laugh and it is because of your foolishness. If you are referring to my IP address and suggesting that I am trashing your thread than I will be fully honest and tell you I only use one sign on name and always have since joining. Anything I am willing to post here I will accept responsibility for and not try to hide behind any other name for protection. I know you can not say the same thing. If you really want to have a discussion about anything I have said towards you please send me a PM and I will be sure to respond.
First, relax.
Take a breath.
I was absolutely not talking about you.
The guy that started this thread, after being away for a year,
came back to trash my thread.
ps
Not very nice questioning people's intelligence.
Talk like that can get you banned.
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