Quota oil spray on the rear wheel; is this an overflow?

[Lucky Phil]

On 5/12/2025 at 8:30 AM, p6x said:

 

The Neodymium magnet makes all the difference!!!

Seriously, the Guzzi original one cost about 14 USD from the usual places. Then you need to also add the shipping. Here, they built the shipping into the price, so all in all, it's the same. The main difference, Votex has it in stock, while the others have to order it after you pay. Delivery in June! I want to fix that Quota as fast as possible.

 

You can buy an aluminium mag plug to fit on ebay from China for like $2

Phil 

Edited 23 hours ago by Lucky Phil

[pete roper]

7 hours ago, p6x said:

 

As soon as I get that oil drain plug, I will fill the rear transmission with oil and ride for a few miles, drain the oil and send it for analysis to Blackstone lab. I will also check for metal burrs on the plug.

I have contacted Mike Haven to get his opinion.

There may have been enough residual lubrication so nothing got irremediably damaged; but this is speculation.

I will take it one step at a time.

Opening the transmission seems to be easy enough. The difficult part is to extract the bearings, since it requires a hub puller and some other specific extraction tools which I do not have, and am not looking to purchase for a one time use.

I found the part https://www.partsandparts.de/en/spare-part-for-moto-guzzi-gu92201070-deep-groove-ball-bearing-70x110x13mm_8604_9522/

 

Oh, no need for pullers really. If you just place the box face down on a couple of bits of wood and heat the centre where the bearing is with a heat gun until it’s nice and hot and then lift the box and drop it on the wood the outer race of the inner bearing usually just drops out.

Whe one on the plate on the wheel side you just remove the seal and then use a big socket or the like to press the bearing out of the plate supporting the plate on both sides in a press. Once again a bit of zealously applied hot air from a heat gun will ease its removal.

[docc]

I learned, the hard way (from some guys that tried that on my V11 reardrive), that drop-method has the chance of fracturing the broader V11 flange (mine broke). 

[pete roper]

OK. I’ve never had a problem but I’ll take that on caution.

[Lucky Phil]

29 minutes ago, docc said:

I learned, the hard way (from some guys that tried that on my V11 reardrive), that drop-method has the chance of fracturing the broader V11 flange (mine broke). 

Were you around to witness this happening docc? I've machined that flange off and if you look at the image above it's like 3mm thick at the box and about 2mm thick at the periphery. I still have the removed piece in the workshop. It would take some sort of 6 inch bench drop to break a section of that thing off even at the periphery. Now a ham fisted set up in a press I wouldn't doubt but a heat and drop on a wooden bench, hmm.

Phil

Edited 21 hours ago by Lucky Phil

[audiomick]

4 minutes ago, Lucky Phil said:

...a heat and drop on a wooden bench, hmm.

Unless maybe the heat was from something a little more aggressive than the heat gun that Pete suggested?

[docc]

20 minutes ago, Lucky Phil said:

Were you around when to witness this happening docc? I've machined that flange off and if you look at the image above it's like 5mm thick at the box and about 3mm thick at the periphery. I still have the removed piece in the workshop. It would take some sort of 6 inch bench drop to break a section of that thing off even at the periphery. Now a ham fisted set up in a press I wouldn't doubt but a heat and drop on a wooden bench, hmm.

Phil

This happened to my V11 reardrive at an independent shop with many years of Guzzi experience and was their "tried and true" method to dismantle the Guzzi reardrive. While I did not witness the act, I got "The Call" that things had not gone well attempting to replace the seals and they were sending the unit "out" (that did not go well, either ) and would weld the crack. I asked if the crack was at 7:00 or 9:00 or what? They said, "Yes."

Turns out, the flange split from the top at 11:00 (looking from the right side of the bike), down the back of the flange along the actual housing, to within an inch of the lower edge at 7:00; that close to breaking it off.

I have taken V11 rear drives apart since, myself, without this drop-method. Maybe fine for the Quota drive with the narrow flange, but just a "heads-up" on that the larger "bell" flange of the V11 SpineFrames could be vulnerable.

[Lucky Phil]

2 minutes ago, docc said:

This happened to my V11 reardrive at an independent shop with many years of Guzzi experience and was their "tried and true" method to dismantle the Guzzi reardrive. While I did not witness the act, I got "The Call" that things had not gone well attempting to replace the seals and they were sending the unit "out" (that did not go well, either ) and would weld the crack. I asked if the crack was at 7:00 or 9:00 or what? They said, "Yes."

Turns out, the flange split from the top at 11:00 (looking from the right side of the bike), down the back of the flange along the actual housing, to within an inch of the lower edge at 7:00; that close to breaking it off.

Yea docc, you don't get damage like that with Petes method. Thats a shop press support "gone wrong" situation. As for the weld it up solution I'd pass on that as well due to distortion issues.

Phil

[audiomick]

8 minutes ago, docc said:

.... I asked if the crack was at 7:00 or 9:00 or what? They said, "Yes."

Oh dear....

[docc]

8 minutes ago, Lucky Phil said:

Yea docc, you don't get damage like that with Petes method. Thats a shop press support "gone wrong" situation. As for the weld it up solution I'd pass on that as well due to distortion issues.

Phil

Solutions tend to be evolutionary . . .

[audiomick]

4 minutes ago, docc said:

Solutions tend to be evolutionary . . .

As long as Mr. Darwin is allowed to have a say in it, that's ok.

Edited 21 hours ago by audiomick

[activpop]

@p6x Dont know if it has been mentioned, but that plug might have fallen out two miles from home.  I have a hard time believing you could stay upright on a greased tire for 200 miles, let alone have that rear drive keep spinning for that distance.  Rear drive fluid has a distinctive odor...I think you could have caught a whiff of it sometime soon after the leak occurred. Maybe backtrack in the car for a short distance to get a visual of where the dump occurred? Might be a possibility, or maybe it's too late now. I hope another biker didn't go through your oil slick. Glad you made it home.

[p6x]

On 5/12/2025 at 7:59 AM, p6x said:

Then I got to Gladewater, and going behind my bike to get the camera, I discovered the oil. Since it was still dripping, and retrospectively, it must have happened very close to the moment when I stopped. If it had during the trip, then there would have been no fresh oil dripping.

@guzzigary Thinking about it after the fact, in one of my previous posts, I think the drain plug dropped shortly before I stopped in Gladewater.

I probably not have rode much with the oil wet tire. I cleaned it while in Gladewater, and I checked there wasn't any fresh oil after that.

I regret to not have checked the oil drain plug was in place at that time. It simply never occurred to me that I could have lost it. 

This is a first. The only incident I had was at a dealership oil change for a car, they had not tightened the new oil filter, and I noticed the oil patch in my garage and rectified the situation.

[p6x]

15 hours ago, Lucky Phil said:

You can buy an aluminium mag plug to fit on ebay from China for like $2

Probably; but then you now have to add the unreliable shipping because they have removed the "de minimis" that exempted packages to go through customs below 800 USD. I would have gotten that plug one month from ordering it.

But there is solace; MPH has the plug, so I am going to go get it today.

[p6x]

15 hours ago, pete roper said:

Bevel gears do not take kindly to being driven without oil.

 

I completely agree. You are transforming an axial force from the driving pinion to rotate the ring gear. It is clear that without any lubricant, you are wearing down the teeth.

More than the bearings, this is likely the weak point in the movement transmission.

Edited 7 hours ago by p6x