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V9 - possible rear drive leak?

Discussion in 'V7/V9 Chat & Tech' started by bkiser, Mar 20, 2017.

  1. bkiser

    bkiser Tuned and Synch'ed

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    When I got back from a 35 mile easy break-in ride on my V9 yesterday, I noticed the right side of the back tire had streaks of liquid that appeared to be radiating out from the center. Wiped it off and it was black and smelled like gear oil, not engine oil. Left the bike overnight and no drips appeared on the floor, and I couldn't find a visible source on the bike. How concerned should I be about this?

    A. keep an eye on it and keep riding gently
    B. call roadside assistance and have it immediately take to shop
    C. common problem, ya noob, and here's how to fix it

    No matter, I bought a Guzzi knowing that there could be some teething issues that might need to get worked out. I love the bike more each time I ride it- up to about 150 miles now.

    Brian
    Ringgold, GA gear_oil_rear_tire.jpg
     
  2. john zibell

    john zibell Moderator Staff Member GT Founder!

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    Not a possible leak, it is a rear drive leak. Get it to your dealer for repair.
     
  3. GT-Rx®

    GT-Rx® Administrator Staff Member

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    As John says above. I have also found on some '16 V7 II's the rear drive flange bolts under the wheel were loose. We check tightness on all we service.
     
  4. bkiser

    bkiser Tuned and Synch'ed

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    Is it possible that the rear drive is not venting correctly? This was the longest, warmest ride I have been on by far. I noticed that the V7 has a vent at the top of the rear drive and my V9 has a flush-fitting rubber plug. Is there a vent underneath the plug? It looks better but seems like it would be an impediment to venting. I could have sworn that I read new Guzzis had roadside assistance, but I have not found that information in my paperwork yet.
     
  5. jkristjan

    jkristjan Just got it firing!

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    Dunno if I'm missing something here but you started out by saying "got back from a ride". So you are not at roadside, you don't need roadside assistance. Now coming to the leak, it is a full-blown leak, a common issue and needs a fix under warranty. There's not much point to wonder what and why exactly, venting or not, it needs a warranty service anyway (and probably they'll replace bolts and gasket because they're all ruined in case the bolts were too lose initially). Contact your dealer and work out a plan/agreement, that's all there is to do really. You can check the rear end oil level, get the right oil, top it up and ride to the dealer carefully, but I would to that only as a last resort. You should not get your hands dirty and make extra expenses on a new bike and secondly it is not a good thing to ride with a lubricated tire. The tire may also need replacement, do some research on this. They will probably not offer it, but perhaps you can demand it.
     
  6. bkiser

    bkiser Tuned and Synch'ed

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    It's been at the dealer since last week. Actually, per my insurance, roadside assistance, ie towing, is available no matter where the bike is parked, if it is immobile for mechanical or safety concerns. So, they towed it the 110 miles to my dealer without complaint. I have not yet been able to speak to the tech, but the service writer thinks that it was a "breather" issue. I am due some additional information tomorrow. In the meantime, they are replacing a leaking fork seal but the bike should be ready to pick up this week.
     
  7. bkiser

    bkiser Tuned and Synch'ed

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    Picked the bike up yesterday and put just a few miles on it last night before the rains came. No additional leakage seen yet. The dealership cleaned everything up, then rode a few miles until they saw some oil. They took the back wheel off and traced the oil leak to the breather. They said that they were not able to see any oil coming from any seals. So, they checked the rear end oil level and found it to be noticeably overfilled. So, their theory is just that the factory overfill and heat from a longer ride and warmer say caused the breather to vent. I am hopeful that it was that simple, but we will see as mileage is added. They put about 30 miles on the bike at my request and no signs of additional oil on the tire. Whether this diagnosis turns out to be the root cause or not, I felt like they were being as straightforward as possible and were easy to work with (Sloan's Motorcycle in Murfreesboro, TN). Nice folks.
     
    GT-Rx® likes this.
  8. vagrant

    vagrant Cruisin' Guzzisti GT Contributor

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    can't speak for the V9 but if a V7 is so much as one tenth of an ounce over what they say to put in it's going to spit it out. voice of experience. I also suspect it might not like some oils. if it happens again drain the hot oil out and put in the right amount yourself.
     
  9. bkiser

    bkiser Tuned and Synch'ed

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    Bike has been ridden 120 miles since the rear-end oil was set to correct factory specs. I have not seen any evidence of leaking. Although I feel a little silly for assuming the worst upfront, better to have it straightened out under warranty than taking a chance. But, I am l glad it was something so simple. The more I ride this bike the more I love it!
     
  10. Wisconsin v7 Racer

    Wisconsin v7 Racer Cruisin' Guzzisti

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    Did you have them check the bolts for tightness since it was in the shop? Don't want to have a actual leak if it can be prevented.
     

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