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V7 Classic rear wheel not engaging at all

Discussion in 'V7/V85/V9 Chat & Tech' started by frocker, Aug 28, 2020.

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  1. frocker

    frocker Just got it firing!

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    Bike: 2008 V7 Classic

    Hi folks,
    So I was riding along earlier today and experienced a sudden total loss of power to the rear wheel. I managed to coast to the side of the road and call a recovery truck.

    The engine runs fine, but every gear behaves like it's in neutral. I can also hear a rattling coming from the rear of the block when the bike is rolled along.

    Prior to this, the only issue I've been experiencing is the common shifting issues (difficulty finding neutral, clutch squeal etc.) when the engine is hot. But this was rectified by adjusting the cable.

    My first thought is that the issues are probably related. Does this sound like it could be the failed clutch rod/throw out bearing? Or possibly the clutch itself is toast?

    Going to start troubleshooting tomorrow, so if anyone could point me in the right direction, that would be hugely appreciated. I'm pretty inexperienced when it comes to working on Guzzis.

    Cheers,
    Felix
     
  2. john zibell

    john zibell Moderator Staff Member GT di Razza Pura

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    Not throw out bearing or push rod. The clutch would be engaged. Possible the clutch is toast, but unlikely. Could be failed rear end from lack of oil, or broken drive shaft/u-joint, or failed gearbox shaft. Too many possibilities from the description.
     
  3. V700Steve

    V700Steve High Miler GT di Razza Pura

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    Maybe something simple like linkage came off.
     
  4. Moto-Uno

    Moto-Uno Cruisin' Guzzisti

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    What linkage might that be ? Peter
     
  5. Kevin.NZ

    Kevin.NZ Cruisin' Guzzisti

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    Gear change linkage.
     
  6. kenrover

    kenrover Just got it firing!

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    If it isn't the gear linkage, it may be output or drive shaft spines. Put it in gear and push the bike. If you can't push it, the splines are ok. If you can, they are toast.
     
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  7. frocker

    frocker Just got it firing!

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    Cheers for the input guys, really helpful stuff. Seems I was totally barking up the wrong tree with the clutch.
    Guess my best bet is to start at the final drive and work my way forward.
    Will post an update with how I get on.
     
  8. Moto-Uno

    Moto-Uno Cruisin' Guzzisti

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    The first check might be to drain the rear drive box oil and see if there's any debris in it .
    After that , rear wheel removal to get the drive box off and then inspect the input splines
    and drive shaft splines . These are probably the easiest checks before going any deeper .
    Peter
     
  9. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    If momentum failed while riding, and the rear wheel still moves freely, I would suspect clutch failure based on your description. Most all other failure items would not allow it to roll, hence causing the rear wheel to lock at speed on you. How many km's do you have on your V7?
     
  10. Brian UK

    Brian UK GT Reference

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    When that same thing happened to my V50, it was the three (yes, only 3) rivets holding the clutch plate together which had sheared.
     
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  11. frocker

    frocker Just got it firing!

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    [​IMG]
    [​IMG]


    Well, looks like I've found the offending part. Drive shaft is in really bad shape!

    Seems pretty unusual for a bike with 20k miles on it. Admittedley this is the first time I've had the swingarm off to inspect, so there might be some routine maintenence job I've totally neglected to do? Guess this could also be a sign of water ingress into the bellows, I do ride through winter in England which means a lot of rain and a lot of grit.

    Either way, I guess it's just a case of ordering a replacement and greasing the hell out of it before it goes in. Thanks again to everyone who offered advice!
     
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  12. Brian UK

    Brian UK GT Reference

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    That looks as if it's been stored under water.
    Certainly no evidence of the drive shaft splines ever seeing grease.

    Are you certain it's only done 20k miles?
     
  13. GT-Rx®

    GT-Rx® Administrator Staff Member GT di Razza Pura

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    Funny, I was literally typing, looks like it lived at the bottom of a river bed. I don’t think I’ve ever seen one that bad.
    Thanks for posting @frocker - always good to see and have documented here.
     
  14. Moto-Uno

    Moto-Uno Cruisin' Guzzisti

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    I feel glad you didn't have to go any deeper ! Peter
     
  15. Brian UK

    Brian UK GT Reference

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    I think, given the state of that part, I would be concerned about the rest. Even bikes stored in barns and worse for 30 years look better.
     
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  16. DeadEye

    DeadEye Cruisin' Guzzisti

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    Shouldn’t part of the drive shaft have been getting oil on it from the rear ?
    It looks like it has seen oil in the past - but distant past!
     
  17. Moto-Uno

    Moto-Uno Cruisin' Guzzisti

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    If it's anything like the rear drive boxes on the Le Mans 2 , then the answer is no . In 250,000 km
    on mine the only lube that ever got on the splines came from my greasing them . Peter
     
  18. Brian UK

    Brian UK GT Reference

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    That damage is more than lack of lubrication.
     
  19. DeadEye

    DeadEye Cruisin' Guzzisti

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    So thinking of the drive box - I would imagine that the oil in that unit would be splashing everywhere- no ?
     
  20. Bisbonian

    Bisbonian Cruisin' Guzzisti

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    The oil in the final drive box stays in the final drive box. The swingarm area where the driveshaft resides, between the final drive and the transmission, should be dry.
     

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