Crankcase breather pipe location. - 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 9 (permalink) Old 01-22-2019, 03:05 PM Thread Starter
Junior Member
 
Join Date: Jan 2019
Location: Leicester UK
Posts: 7
iTrader: (0)
 
Crankcase breather pipe location.

Hi guyís just bought a 750 as a winter project.Ive done an ear shave and for the life of me canít find the engine crankcase breather.After removing the air box/surge tank I have a rubber hose the runs down the rear oh side of the radiator but itís not connected anywhere (presumably the top was connected to the surge tank). I have a filter to fit but nowhere to fit it. Spent half an hour with a torch but no luck finding the pipe. I have noticed a bit of oil on the engine covers so maybe the pipe has been disconnected a while. Can anyone point me in the right direction. ? Thanks guys.
Martync is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 01-22-2019, 03:51 PM
Super Moderator
 
Join Date: Feb 2013
Location: SW Florida
Posts: 2,442
iTrader: (5)
 
front cylinder, on front side of it, on left side of front face (when sitting on bike). small stubby pipe that sticks out.

normally the hose for it connects directly to the surge tank.

2005 VN750

Sold 11-27-17
michiganteddybear is offline  
post #3 of 9 (permalink) Old 01-22-2019, 03:52 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,486
iTrader: (5)
   
Insert a 3/8" fuel hose into the original breather hose and clamp it. Run the fuel hose to the spot you want to mount the filter. Depends on the filter you have, of course. Mine is mounted to a bolt where the right side air filter used to be (earshaved).

Or, some just mounted the filter onto the original vent hose, having a filter that fits that larger hose.

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
Spockster is offline  
 
post #4 of 9 (permalink) Old 01-22-2019, 04:10 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,486
iTrader: (5)
   
Oops - As MTB said, the nipple for the crankcase vent is just above the oil filter.

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
Spockster is offline  
post #5 of 9 (permalink) Old 01-22-2019, 06:25 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,486
iTrader: (5)
   
Quote:
Originally Posted by Martync View Post
.... After removing the air box/surge tank I have a rubber hose the runs down the rear oh side of the radiator but it’s not connected anywhere (presumably the top was connected to the surge tank). ....
That was a drain hose for the airbox. About a 1/4" - 3/16" hose.

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

Last edited by Spockster; 01-23-2019 at 03:05 PM. Reason: typo
Spockster is offline  
post #6 of 9 (permalink) Old 01-23-2019, 02:57 PM Thread Starter
Junior Member
 
Join Date: Jan 2019
Location: Leicester UK
Posts: 7
iTrader: (0)
 
Well, been hunting the elusive breather outlet again. Researched where it should be and seen photos on the web. Where I was expecting to find it is plugged. It looks like a factory thing. Ive attached a photo, am I having a total blonde moment or should the pipe be here? Looked around the oil filter (lower down) and pulled the radiator forward to get a better view and can't for the life of me see the crankcase vent. The bikes a Spanish model (std European) but I'm sure theres no variation between US and Europe. ?
Attached Thumbnails
Click image for larger version

Name:	DSC_0062.JPG
Views:	91
Size:	75.4 KB
ID:	45457  
Martync is offline  
post #7 of 9 (permalink) Old 01-23-2019, 03:04 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,486
iTrader: (5)
   
You have it circled there, but definitely looks like it's plugged.

Have no idea if there's a difference with Euro models. Most engines need some form of crankcase vent, but that looks factory.

Did it have the 5/8" elbow hose on the airbox, or the hole in the airbox for the hose? Here's one with the hose attached:


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

Last edited by Spockster; 01-23-2019 at 03:09 PM.
Spockster is offline  
post #8 of 9 (permalink) Old 01-23-2019, 03:18 PM Thread Starter
Junior Member
 
Join Date: Jan 2019
Location: Leicester UK
Posts: 7
iTrader: (0)
 
I have found the hose behind the rad with a larger diameter portion of pipe at the top but I canít confirm where the top of the pipe was attached,I suspect the surge tank, but that got destroyed,kicked around the garage and jumped on when it finally came out. I suppose I could machine a new oil filler cap with an integral breather tube to make sure the crankcase vents. I know the European models have 110 main jets and USA and Canada have 135 so maybe there are other differences
Martync is offline  
post #9 of 9 (permalink) Old 01-23-2019, 03:25 PM
Senior Member
 
Spockster's Avatar
 
Join Date: Nov 2012
Location: WV
Posts: 6,486
iTrader: (5)
   
Someone must have capped the hole. I can't see the factory allowing unfiltered air into the airbox. If you had the hose, it had to be connected on the airbox, but the engine is definitely capped.

Might be able to remove the cap? Then press fit a nipple for hose attachment.

I did learn about the Euro carb jetting, from a poster here a couple months ago, surprised me.

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
Spockster is offline  
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

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

Password:


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

Email Address:
OR

Log-in










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