Tank Breather Hoses - Ducati Monster Forums: Ducati Monster Motorcycle Forum
 
Thread Tools Display Modes
post #1 of 4 (permalink) Old 01-26-2017, 10:08 AM Thread Starter
Junior Member
 
Join Date: Dec 2011
Posts: 7
Question Tank Breather Hoses

I just recently bought a salvage Monster 796 and have been doing repairs on it. I noticed the previous owner kind of half-assed the charcoal canister removal. Some breather hoses still led to the intake track and the other end to nowhere, etc.

Anyway I got it cleaned up, but I have a question. There are usually two breather tubes attached to the two nipples at the top of the fuel tank. However, I only have the left breather hose still attached and no hose for the right red nipple (see attached picture for reference). Can I plug the red nipple on the right or do the two have different purposes and both need to be open? Any info would be great! Thanks.
Attached Thumbnails
Click image for larger version

Name:	Ducati_Monster_696_09_25_7_2016.jpg
Views:	26
Size:	68.2 KB
ID:	201818  
MonsterMaster is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 01-26-2017, 06:07 PM
Member
 
Join Date: Dec 2014
Posts: 80
I used to have a 696 (same tank). I don't recall where those two go, but I have owned several other Monsters, and they each had two vent hoses. I can tell you what they do on these Monsters.

One of them vents the cap area--if you overfill the tank (obviously, with the cap open) this one will vent that excess fuel and fumes overboard.

When the cap is closed, the other one vents the actual tank--if the fuel expands due to engine heat, for instance, this vent will allow the excess fuel/fumes overboard.

So I would get some more line and run both to either a small catch bottle, or route both somewhere such that any fuel vented will end up somewhere safe (not on the engine/exhaust, or on a tire).
orionengnr is offline  
post #3 of 4 (permalink) Old 01-26-2017, 07:43 PM
Bub
Senior Member
 
Bub's Avatar
 
Join Date: Apr 2014
Location: Oregon Rain Forest
Posts: 194
Glad you have it cleaned up. Not sure how half-fast the previous owner was, but it is worth noting that the tubes to the F.I. bodies need to be plugged as well. I used the TPO kit because it was easy and had good instructions - maybe start over for cheap if in doubt. There are other posts on this forum dealing with the cannisterectomy! You also might want check out a left euro oil cooler cover. Cheers!

I wave to everyone on two wheels (unless it's a car).
Bub is offline  
post #4 of 4 (permalink) Old 01-27-2017, 11:54 AM Thread Starter
Junior Member
 
Join Date: Dec 2011
Posts: 7
Quote:
Originally Posted by orionengnr View Post
I used to have a 696 (same tank). I don't recall where those two go, but I have owned several other Monsters, and they each had two vent hoses. I can tell you what they do on these Monsters.

One of them vents the cap area--if you overfill the tank (obviously, with the cap open) this one will vent that excess fuel and fumes overboard.

When the cap is closed, the other one vents the actual tank--if the fuel expands due to engine heat, for instance, this vent will allow the excess fuel/fumes overboard.

So I would get some more line and run both to either a small catch bottle, or route both somewhere such that any fuel vented will end up somewhere safe (not on the engine/exhaust, or on a tire).
Super information! Thank you very much, I was prepared to plug one of them but now I'll definitely get some new line and route them away.

Quote:
Originally Posted by Bub View Post
Glad you have it cleaned up. Not sure how half-fast the previous owner was, but it is worth noting that the tubes to the F.I. bodies need to be plugged as well. I used the TPO kit because it was easy and had good instructions - maybe start over for cheap if in doubt. There are other posts on this forum dealing with the cannisterectomy! You also might want check out a left euro oil cooler cover. Cheers!
Thank you! I actually just got done plugging the FI bodies and I'm getting the new air conveyor for the side the canister was removed from.
MonsterMaster is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



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

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









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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



Posting Rules  
You may not 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 Off
Pingbacks are Off
Refbacks are Off

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