Author Topic: New v85 rear drive leak  (Read 847 times)

Offline Gino

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New v85 rear drive leak
« on: May 16, 2022, 04:22:45 PM »
So my wife and I picked up a pair of v85ís last week, been running them in ready for first service this weekend, sadly my wifeís one started to leak from the rear drive at 550 miles ( thatís when I noticed it) both 2022 models so not old stock. A tad disappointed. We are of for a wee euro tour next week so itís going anyway. First brand new road bike Iíve ever bought in the last 50 years. Bugger

Offline Dave Swanson

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Re: New v85 rear drive leak
« Reply #1 on: May 16, 2022, 04:24:36 PM »
Have you been able to determine the location of the leak?
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Offline Huzo

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Re: New v85 rear drive leak
« Reply #2 on: May 16, 2022, 06:01:28 PM »
Mine did the same thing.
Itís the seal on the splined pinion shaft. Not a big job.
Off with the bevelbox .
With mine, the seal came out VERY easilyÖtoo easily. It wasnít a very good fit in the recess and fairly hard. I got the usual ďhave to wait on Piaggio for the warranty claimÖĒ
My response was ..
ďBullshitÖJust replace it and Iíll payÖ.Ē
I went next door for lunch and got a call half hour later, all done, 70 bucks.

I did not want to do it myself in case there was any damage done, at least this way they own the consequences.
That was 17,000 km backÖ :thumb:

Offline Kiwi_Roy

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Re: New v85 rear drive leak
« Reply #3 on: May 16, 2022, 06:10:40 PM »
Is the oil splattering around the rear tire in a radial pattern, take the fill level plug out, the one at 9 O'clock to see if its over-full.
Sometimes rain can enter the driveshaft tunnel through the flexible boot behind the gearbox, run down the shaft and into the rear drive over filling it.
Changing the oil in the rear end is part of first service.
« Last Edit: May 16, 2022, 06:21:53 PM by Kiwi_Roy »
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Re: New v85 rear drive leak
« Reply #3 on: May 16, 2022, 06:10:40 PM »

Offline Huzo

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Re: New v85 rear drive leak
« Reply #4 on: May 16, 2022, 06:15:49 PM »
Thereís a little hole right at the end of the swingarm, close to the join with the bevelbox.
Thatís where the condensation and swill can exit the casting.
See if thereís anything producing there.
Really though, itís 10 minutes to have it offÖ(if you have a centrestand..)
You can stop guessing at that point.

Offline Huzo

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Re: New v85 rear drive leak
« Reply #5 on: May 16, 2022, 06:20:31 PM »
So my wife and I picked up a pair of v85ís last week, been running them in ready for first service this weekend, sadly my wifeís one started to leak from the rear drive at 550 miles ( thatís when I noticed it) both 2022 models so not old stock. A tad disappointed. We are of for a wee euro tour next week so itís going anyway. First brand new road bike Iíve ever bought in the last 50 years. Bugger
Seriously mate, donít ride it like that.
If it gets worse (and it will), you could end up welding the innards together, or worse still having an oil coating on the rear tyre with predictable consequences.
Just take it off and hoof it into your most trusted shop. It is not a big job.

Offline sgl0226

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Re: New v85 rear drive leak
« Reply #6 on: May 16, 2022, 09:19:47 PM »
My new v85tt had an apparent drive shaft leak as well.  I brought it in and my dealer checked it out.  He said that it had been over packed with grease from the factory.  Said the same thing happened a week before with another new one.  Iíve put about 150 miles on since without an issue.  Iím not mechanically inclined so Iím not sure exactly what overpacked with grease meant, but it turned out to be nothing.  Cadre cycle is my dealer in Cincinnati and I have 100% confidence in them.  You may want to call and ask them about the issue as it may pertain to your bike as well. 
« Last Edit: May 16, 2022, 09:23:10 PM by sgl0226 »

Offline Bulldog9

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Re: New v85 rear drive leak
« Reply #7 on: May 17, 2022, 06:31:01 AM »
Seems that there have been equal numbers of bad seals and over filled rear drives. I would try lowering the gear oil in the pumpkin, clean things up, check the vent is not clogged and see where things go.
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Offline JohninPA

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Re: New v85 rear drive leak
« Reply #8 on: May 17, 2022, 09:07:25 AM »
My new V7850 did the same. Oil splattered all over rear wheel and tire sidewall, which I noticed at about 300 miles. I drained the rear and refilled with correct amount of oil, problem gone. Now at 2200 miles, still good.

Overfilled from the factory ... common issue although I don't know why. Seems simple enough to fill correctly. My riding buddy had the same issue with his V7850.
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Offline sgl0226

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Re: New v85 rear drive leak
« Reply #9 on: May 17, 2022, 09:13:29 AM »
So my wife and I picked up a pair of v85ís last week, been running them in ready for first service this weekend, sadly my wifeís one started to leak from the rear drive at 550 miles ( thatís when I noticed it) both 2022 models so not old stock. A tad disappointed. We are of for a wee euro tour next week so itís going anyway. First brand new road bike Iíve ever bought in the last 50 years. Bugger


Did you get the bikes fixed?  Was it simply an overfill issue?  Hopefully all is good and the two of you enjoy the tour. 

Offline Gino

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Re: New v85 rear drive leak
« Reply #10 on: May 17, 2022, 04:14:44 PM »

Did you get the bikes fixed?  Was it simply an overfill issue?  Hopefully all is good and the two of you enjoy the tour.
Thanks for the replies, we have several old tontis so no stranger to a set of spannerís. Both are booked in for the first service on Saturday so I guess after a discussion Iíll know what the options are. Iím not inclined to touch it while itís under warranty, I have plenty other Guzziís and Nortons to take up my spannering time. Iíll let you know how it goes.
Gino

Offline Caffeineo

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Re: New v85 rear drive leak
« Reply #11 on: May 17, 2022, 06:29:59 PM »
What I am hearing is that Moto Guzzi is generous with the rear drive oil.......yet stingy with grease.  :grin:
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Offline twowheeladdict

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Re: New v85 rear drive leak
« Reply #12 on: May 17, 2022, 09:30:27 PM »
My new V7850 did the same. Oil splattered all over rear wheel and tire sidewall, which I noticed at about 300 miles. I drained the rear and refilled with correct amount of oil, problem gone. Now at 2200 miles, still good.

Overfilled from the factory ... common issue although I don't know why. Seems simple enough to fill correctly. My riding buddy had the same issue with his V7850.

On a different brand shaft drive bike I owned, the maintenance manual said "do not spin the wheel while filling, or you will overfill".  I watched the tech spin the wheel.   :rolleyes:
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Offline egschade

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Re: New v85 rear drive leak
« Reply #13 on: May 18, 2022, 09:18:11 AM »
On a different brand shaft drive bike I owned, the maintenance manual said "do not spin the wheel while filling, or you will overfill".  I watched the tech spin the wheel.   :rolleyes:

This is true of any shaft drive gearbox. Turning the wheel coats the gears and temporarily lowers the observable oil level. I made that mistake on my first shaft drive bike.
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Offline Cam3512

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Re: New v85 rear drive leak
« Reply #14 on: May 19, 2022, 09:31:51 AM »
Originally the book called for 160-180 ml of gear oil in the rear drive.  Turns out anything more than 160 was too much.  Part of the recall was to drain fully and replace with 160 ml.  Even new from the factory some have been overfilled.  Make sure your dealer is aware of this.
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Offline Caffeineo

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Re: New v85 rear drive leak
« Reply #15 on: May 19, 2022, 11:06:00 AM »
Originally the book called for 160-180 ml of gear oil in the rear drive.  Turns out anything more than 160 was too much.  Part of the recall was to drain fully and replace with 160 ml.  Even new from the factory some have been overfilled.  Make sure your dealer is aware of this.

Thank you for the reminder. First service will be due soon and the manual I downloaded still has 180 listed.
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Offline Vagrant

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Re: New v85 rear drive leak
« Reply #16 on: May 19, 2022, 05:20:18 PM »
IT IS WRONG!!!
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Offline Kiwi_Roy

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Re: New v85 rear drive leak
« Reply #17 on: May 19, 2022, 07:41:51 PM »
Only fill it until the oil runs out the level plug at 9 O'clock, that's what it's put there for.
There's often confusion between the gearbox and the transmission aka pumpkin.
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Offline Cam3512

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Re: New v85 rear drive leak
« Reply #18 on: May 20, 2022, 07:48:40 AM »
MEASURE and fill.  The hole on the back (9 oíclock) is the FILL hole, top (12 oíclock) is the vent. 
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Offline jpv7

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Re: New v85 rear drive leak
« Reply #19 on: May 20, 2022, 01:20:50 PM »
Originally the book called for 160-180 ml of gear oil in the rear drive.  Turns out anything more than 160 was too much.  Part of the recall was to drain fully and replace with 160 ml.  Even new from the factory some have been overfilled.  Make sure your dealer is aware of this.
+1.  Been doing it this way last few changes.  No issues.

Offline Vagrant

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Re: New v85 rear drive leak
« Reply #20 on: May 20, 2022, 04:44:21 PM »
Drain it dry. Put in 160 and not a drop more.
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Offline Gino

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Re: New v85 rear drive leak
« Reply #21 on: May 21, 2022, 05:09:35 PM »
Guess what, I put it in to the dealer and waited to be disappointed , I was, piaggio and their dealer network are poor. Nobody told me that if I put our bikes in for a service 30 miles before the service interval that the service light would come on 30 miles after. The mechanic told me a whole load of bullshit about the rear drive on my wifeís bike has found itís level. A couple of years ago Iíd have kicked his ass but really canít be bothered. So after owning Guzziís and maintaining them for 40 years my opinion is do your own service and donít listen to the salesman about what they can do for you. I would have been better buying 2 off the discount shops on eBay. And we are still waiting for my wifeís luggage@month after ordering it.
I like the bike, my wife also but donít think Iíd buy another new bike again.

 

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