Ridemalibu Motorcycle Rentals & Tours – Los Angeles CA
  1. Ciao Guest - You’ve landed at the ultimate Guzzi site. In SoCal? See the SERVICE tab above for the best in service, tires, tuning and installation of our products or custom work. NEW FORUM REGISTRATIONS REQUIRE EMAIL ACTIVATION - CHECK YOUR SPAM FOLDER. ALWAYS TRY A SEARCH BEFORE STARTING A NEW TOPIC - Most questions you may have are already answered on the Forum with FACTS, NOT OPINIONS. PLEASE DON'T BE A DRIVE-BY POSTER: As a common courtesy, check back if you are posting elsewhere on the web. Note there's decades of Guzzi hands-on experienced help on this site, all whom give endless amounts of their time for free; BE COURTEOUS AND RESPECTFUL! There is zero tolerance on personal attacks and off-site links to other Forums or competing products. Also be sure to click on the Store link also above for our 600+ product inventory, including many of our 100% Made-in-house-USA GTM products and engine kits. We appreciate the consideration, understanding and your business... past and future. Also be sure to see our GTMotoCycles.com custom BUILDS tab above. WE ARE ONLINE ONLY - NO PHONE CALLS MADE OR RECEIVED.

Oil Breather Alternative

Discussion in 'V7/V85/V9 Chat & Tech' started by mnguzzi, Aug 5, 2015.

  1. elkgrichard

    elkgrichard High Miler

    Joined:
    Mar 31, 2014
    Messages:
    558
    Likes Received:
    65
    Location:
    California
    Sounds like your systems been working good for you. I had no choice but to do what I did, the benefits are also good with a cleaner burning combustion chambers.
     
  2. GuzziV65TT

    GuzziV65TT Cruisin' Guzzisti

    Joined:
    May 17, 2015
    Messages:
    109
    Likes Received:
    34
    Location:
    United Kingdom
    Hi Todd

    this is the oem v65 and v65tt breather setup

    [​IMG]
     
    GT-Rx® likes this.
  3. GuzziV65TT

    GuzziV65TT Cruisin' Guzzisti

    Joined:
    May 17, 2015
    Messages:
    109
    Likes Received:
    34
    Location:
    United Kingdom

    try living in the cold damp wet up.... had mayo on my dipstick,,,
     
  4. pokeyjoe

    pokeyjoe High Miler

    Joined:
    Sep 1, 2012
    Messages:
    753
    Likes Received:
    98
    Location:
    Long Beach, California
    I'm not sure if I posted a problem here of not, but here is my current problem

    I have oil on the seam between the crankcase and the bell housing. I thought it was coming from inside, so I took it to the dealer.

    The dealer says the oil is leaking from the bottom of the airbox and dripping on the engine. Since I did not check for oil on the bottom of the airbox, I cannot say if that is true or not. I have had the air filter out several times to check for oil, but have not ever found anything significant. A little puddle here or there, but that's it. There does appear to be inacessible compartments with foam blocks in the lower front portion of the box. Maybe that's where it's coming from. The dealer drained out some oil ("too full", of course) and I'll pick it up later in the week.

    Looks like I may have to try an alternative...
     
  5. GuzziV65TT

    GuzziV65TT Cruisin' Guzzisti

    Joined:
    May 17, 2015
    Messages:
    109
    Likes Received:
    34
    Location:
    United Kingdom
    That's easy to prove or disprove....

    Clean the engine and box with de greaser and dry it . Blow baby powder or flour over the seam between engine and then ride. You will see stains and paths of oil in the powder as it leaks out

    You do see some the have a very slight leak from the rear main seal that comes out from the bell housing seam.


    Every guzzi I worked on has some form of condensed oil in the air box and its quite likely that it leaks out
     
    Last edited: May 4, 2016
  6. rbm

    rbm Cruisin' Guzzisti

    Joined:
    Mar 7, 2012
    Messages:
    174
    Likes Received:
    29
    Location:
    Toronto
    Are the problems and solutions talked about in this thread confined to the later V7 series with single throttle body or are they also applicable to the earlier V7's with dual throttle bodies?
     
  7. GuzziV65TT

    GuzziV65TT Cruisin' Guzzisti

    Joined:
    May 17, 2015
    Messages:
    109
    Likes Received:
    34
    Location:
    United Kingdom
    Basics apply to any small block from late 70's v35 onwards
     
  8. GEO

    GEO Tuned and Synch'ed

    Joined:
    Oct 31, 2015
    Messages:
    44
    Likes Received:
    18
    Location:
    ATHENS GREECE
    I follow this thread with much interest but somewhere I was lost so I would like to make some things clear.Please help me.
    In V7ii's at least two rubber tubes from the rocker covers plug at the backbone tube of the frame.Higher at the backbone tube (towards the steering) plugs another rubber tube which goes to the air box and lower (towards the seat)another one which via a one way valve plugs to the sump.
    I believe what you propose is to unplug the rubber tube of the air box and somehow extend it somewhere at the back at open air. I didn't understand what I am doing with the sump tube, logically you leave it as it is, plugged to the backbone tube ( since I don't see how that may cause a problem),or am I wrong?

    Thanks George
     
  9. pokeyjoe

    pokeyjoe High Miler

    Joined:
    Sep 1, 2012
    Messages:
    753
    Likes Received:
    98
    Location:
    Long Beach, California
    The lower rubber hose (tube) that you mention doesn't go directly to the sump. That's what I would like it to do. In stock form, it connects to an isolated compartment in the front of the airbox. There is another line that goes from that compartment down to the sump.

    This all gets more confusing if you look at the Moto Guzzi parts diagrams. The USA diagrams show many more tubes connected to the airbox with "Ts" and some other unknown destination. My bike, a USA bike, looks just like the Euro diagram. Go figure.
     
  10. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

    Joined:
    Jul 1, 2009
    Messages:
    11,070
    Likes Received:
    3,246
    Location:
    Malibu
    ~5"x3"x3" - yes it sure would.
     
  11. elkgrichard

    elkgrichard High Miler

    Joined:
    Mar 31, 2014
    Messages:
    558
    Likes Received:
    65
    Location:
    California
    Someone put a post up on another forum, a tech from a Guzzi shop and he said the same thing about the rear main seals that some leak a little bit. He said that often after replaced during a clutch overhaul the rear main seals get a slight leak with a few miles. His claim is that the cranks never run totally true from the factory on some of the bikes.
     
  12. GuzziV65TT

    GuzziV65TT Cruisin' Guzzisti

    Joined:
    May 17, 2015
    Messages:
    109
    Likes Received:
    34
    Location:
    United Kingdom

    Changed the rear seal on the v7tt engine when I swapped the clutch and it still lets a tiny bit out on long fast rides
     
  13. elkgrichard

    elkgrichard High Miler

    Joined:
    Mar 31, 2014
    Messages:
    558
    Likes Received:
    65
    Location:
    California
    Put in a wet clutch and fill the bell housing with oil. LOL

    Maybe the oil on a dry clutch makes it last longer, not to worry.
     
    Last edited: May 5, 2016
  14. GEO

    GEO Tuned and Synch'ed

    Joined:
    Oct 31, 2015
    Messages:
    44
    Likes Received:
    18
    Location:
    ATHENS GREECE
    In the European models (Greek at least) there is no such isolated compartment ,the hose goes directly from the lower part of the backbone tube to the sump.
     
  15. pokeyjoe

    pokeyjoe High Miler

    Joined:
    Sep 1, 2012
    Messages:
    753
    Likes Received:
    98
    Location:
    Long Beach, California
    Thank you. At least I know I should be able to route it like that without a problem.
     
  16. elkgrichard

    elkgrichard High Miler

    Joined:
    Mar 31, 2014
    Messages:
    558
    Likes Received:
    65
    Location:
    California
    Be advised....do not let that one way check valve sit too low below that starter. If it's too low the oil will run past that check valve from the sump when the bike is not running and end up trapped between the check valve and the airbox. It will then get sucked into the airbox when you start the bike. If you have oil usage issues that is probably what's going on.

    If you find oil puddled up on the bottom of the airbox, that is deffently the cause. Since when things work correctly, all you should find inside that airbox will be a light misting. Light misting good, puddles bad.

    My advice would be to actually mount that check valve above the starter motor!!!!! The factory mounted them below the starter motor for esthetics and that's why some folks are having this stupid issue in the first place. Who ever mounted it on my bike got a little liberal with the length of the hose and it hung down below that starter motor by a good margin, it was in fact below the oil level in the freakin sump. We do have a thing called gravity. If you can't figure this one out, it's the meds screwing up your mind.


    In fact I would go as far as to say this is something that should be re-mounted on all of these bikes and should be on a check list of things to change along with the plastic fuel filter, Loctite on the front tank mounting bolts, tie strap the clutch cable, making sure you remove the swing arm and grease the frocking splines which sometimes found with little grease, etc. I don't want to re-write a dictionary, so I'll stop here.
     
    Last edited: May 6, 2016
  17. GEO

    GEO Tuned and Synch'ed

    Joined:
    Oct 31, 2015
    Messages:
    44
    Likes Received:
    18
    Location:
    ATHENS GREECE
    Yes but you may still have oil puddles inside the air box as is the case with my bike....................go figure why.
     
  18. GEO

    GEO Tuned and Synch'ed

    Joined:
    Oct 31, 2015
    Messages:
    44
    Likes Received:
    18
    Location:
    ATHENS GREECE
    I don't think this is the case because the sump hose in my bike (and probably all European bikes) goes to the frame tube which is way to high.
     
  19. elkgrichard

    elkgrichard High Miler

    Joined:
    Mar 31, 2014
    Messages:
    558
    Likes Received:
    65
    Location:
    California
    Probably why they changed it on those bikes. That appears to me to be a better system to safeguard against this issue I and others experienced. I was the one who figured it out and they responded to it.

    Sent them a letter explaining this issue with the breather system return hose being too low.

    Sent the letter last year and the following year they came up with another system.

    This thing had me perplexed for a long time.

    I pretty much have got it figured out. I can understand why they changed the system. It was flawed on the 2013 models. OK if you don't let that check valve hang too low.
     
    Last edited: May 7, 2016
  20. pokeyjoe

    pokeyjoe High Miler

    Joined:
    Sep 1, 2012
    Messages:
    753
    Likes Received:
    98
    Location:
    Long Beach, California
    Update. Although I do have oil in the airbox, that's not the cause of my bellhousing leak. I picked up the bike today. The service department was closed, so I just brought it home. The front of the airbox is 7.5 inches behind the seam on the bellhousing. Tell me again how the oil is dripping from the airbox to that seam?
     

Share This Page