odd oil leak - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
Engine / Exhaust / Cooling
\ From the radiator, through the case and out
the exhaust. If it has to do with the cooling,
engine or exhaust, discuss it here!

LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 10-04-2011, 09:30 PM Thread Starter
Junior Member
Joking About 8's Avatar
Join Date: Oct 2010
Location: Southern Cal.
Posts: 5
iTrader: (0)
odd oil leak

Hey guys, i just took a decent road trip on my bike and discovered an odd oil leak. oil seems to be pooling in the rear, right side spark plug recess. I have yet to be able to wrench on it, seeing as how i just relocated for the navy, and it is my daily vehicle. The bike runs just fine, and doesnt blow smoke out of the tailpipe, so its not in the combustion chamber, but unless it's a damaged block, i dont really have any ideas. if anyone else has had this happen, any insite would be greatly appreciated. by the way, i am now riding in san diego area, so any good local info would be appreciated.

98 VN750 with ears shaved, K&N's, Dial a Jet, and yes, bags when it's practical.

Live by Chance...
Love by Choice...
Joking About 8 is offline  
Sponsored Links
post #2 of 3 (permalink) Old 10-04-2011, 11:58 PM
Linkmeister Supreme
OlHossCanada's Avatar
Join Date: Aug 2008
Location: Lethbridge, Alberta, Canada
Posts: 7,960
iTrader: (8)
There are two o-ring seals on the spark plug retainer tube, one on top, one on bottom. Check them first. Also check the tube for any hole worn by the cam chains.
The rear axle nut can be used as a 27mm removal tool for turning the retaining tube out.

Picture in this diagram:
Retaining tube #92066
O-rings #92055 and 92055B

Hope this helps. Report back and let us know what you find.


1991 VN 750 -"Cosmic Lady" or "Bad Girl"?
Purchased May 16, 2008
Approx.19,300km (12,000 miles)

H-D windshield
Relocated R/R
MF-AGM battery
Fiamm Freeway Blaster horns
F&S luggage rack and engine guard
Kury Offset Hiway pegs
July 13, 2016, Riding on the DARKSIDE now, Classic Radial 165/80-15

OlHossCanada is offline  
post #3 of 3 (permalink) Old 10-05-2011, 04:56 PM
Senior Member
Cheman's Avatar
Join Date: Jun 2007
Location: Gardnerville, NV
Posts: 195
iTrader: (2)
I would also suggest that the drain from the spark plug well is clogged. Otherwise that oil would be making its way to the front of the engine where the drain exits and be showing as a leak there. Find the exit hole and stick a wire up it to clear it.

Opps, you said the rear cyl. I guess that means the drain would be in the back? not the front?! Sold my vn750 a year ago so cant go look

Purchased 7/03 w/13000 mi
Sold10/10 27,000miles
Ear shave
V&H Cruisers
Tim Parrott stator
R/R relocated
Iridium Plugs
AGM Battery
Splines lubed
Clear Alternative LED brake light
TOC mcct
Mutazu LN Hard saddlebags
Chad's floorboards
Current ride-2009 Honda VTX1300

Last edited by Cheman; 10-05-2011 at 05:10 PM.
Cheman is offline  
Sponsored Links


Quick Reply

Register Now

In order to be able to post messages on the Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Once registered, your User Name"cannot be changed". We can make exceptions within 7 days, but after that, it is set in stone.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome