Crankcase cover 3 gasket

Tenere Mikeal

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Jul 16, 2020
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Hello all.

For some reason, on my 2020 Super10, my gasket (pn: 23P-15462-00-00) had a considerable amount of rust. I didn't notice it until the day after I brought it home. The best working theory I have is that someone sprayed a concentrated cleaner on it and let it sit. I have issued a warranty claim with Yamaha. The dealer doubts Yamaha will do cover it.

Regardless of whether Yamaha covers the issue under warranty, I want to change that gasket. I've already ordered it. I have not been able to ascertain the tightening torque specification on the screws (yes screws, not bolts) (pn: 90149-06172-00) that secure crankcase cover 3 (pn: 23P-15431-10-00).

Does anyone know the torque specification for Crankcase cover 3 (23P-15431-10-00) screws (90149-06172-00)?

It's also interesting that the screw part number changed from 90149-06185-00 to 90149-06172-00.

Part reference:

gasket rust over time.jpg
 

Sierra1

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There was another person that just recently made the same comment, as far rust. The consensus from the well experienced members was it was not an issue. I agree that it appears that the gasket is now gone, but it also appears that your shifter is missing too. I don't think it's even possible for a metal gasket to get "sucked" into the motor. Odd.

Edit: went back and found "the person". It was you. Sorry, I didn't pay enough attention. But, CW and Eric didn't feel there was a cause for concern. They're two of my go to people for anything Tenere. But, it's not my bike. Do what makes you comfortable. :)
 
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Alexander

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I have not been able to ascertain the tightening torque specification on the screws (yes screws, not bolts) (pn: 90149-06172-00) that secure crankcase cover 3 (pn: 23P-15431-10-00).

Does anyone know the torque specification for Crankcase cover 3 (23P-15431-10-00) screws (90149-06172-00)?
Never done it myself, but the manual's torque specs list a "middle gear side cover screw" with a torque spec of 10 Nm / 7.2 ft-lb. Also shows a symbol to add "locktite" to the threads. (Should be 6 screws in total, M6 thread, for reference).

Someone will have to correct me if that's wrong, as I'm still a little wet-behind-the-ears on this bike -- but I presume that's what's being referred to as "crankcase cover 3."
 
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WJBertrand

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Clean it up and then squirt a little ACF-50 on it. Not worth messing with unless it’s leaking.


Sent from my iPhone using Tapatalk Pro
 

RonH

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Don't even need to bother with ACF-50. Just clean it and forget about it. By the way, this is the same poster that started the other thread, so it's not another case of rust. There is only the one.
 

ballisticexchris

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[Just to clarify for anybody reading this post, note that Chris later points out this entire post was an attempt at humor and not serious. - CW]

Mikeal, I would not chance failure of the middle pinion gears. There are only one 2 small nuts and conical spring/thrust washer (with shims) that hold the gears together. The heat expansion of all those parts leads to the gasket doing what you have described.

When I took delivery of mine I removed the cover and re-shimmed the pinion gears with almost zero play. Make sure to use the Loctite 2760 Red Primerless when reassembling it. For the new gasket I coat it with Permatex Aviation non hardening. Then simply reinstall the small case cover bolts using the standard 271 Red Loctite and torque to spec. It's not a perfect or permanent solution but it should get you down the road for another 10,000 miles or so before you have to do it again.

Unfortunately, pinion failure is very common to Japanese shaft driven bikes. The Super Tenere is no different. It's the cost of ownership for us buying a low quality machine built with parts sourced out of China. I understood that when I bought this bike. BMW solved this problem long ago by using much more refined drive system on the GS models. It's simply a case of you get what you pay for.

You won't hear about pinion failures much if at all on the forums. This is simply due to us being a very small percentage of the actual Super Tenere owners. Just go to any local dealership that sells/services FJR's and XTZ 12's. The service departments have a rough time keeping up with the demand of driveline failures on these machines.

Hope this helps.
 
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OldRider

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Mikeal, I would not chance failure of the middle pinion gears. There are only one 2 small nuts and conical spring/thrust washer (with shims) that hold the gears together. The heat expansion of all those parts leads to the gasket doing what you have described.

When I took delivery of mine I removed the cover and re-shimmed the pinion gears with almost zero play. Make sure to use the Loctite 2760 Red Primerless when reassembling it. For the new gasket I coat it with Permatex Aviation non hardening. Then simply reinstall the small case cover bolts using the standard 271 Red Loctite and torque to spec. It's not a perfect or permanent solution but it should get you down the road for another 10,000 miles or so before you have to do it again.

Unfortunately, pinion failure is very common to Japanese shaft driven bikes. The Super Tenere is no different. It's the cost of ownership for us buying a low quality machine built with parts sourced out of China. I understood that when I bought this bike. BMW solved this problem long ago by using much more refined drive system on the GS models. It's simply a case of you get what you pay for.

You won't hear about pinion failures much if at all on the forums. This is simply due to us being a very small percentage of the actual Super Tenere owners. Just go to any local dealership that sells/services FJR's and XTZ 12's. The service departments have a rough time keeping up with the demand of driveline failures on these machines.

Hope this helps.
No, no, no.

"pinion failure is very common to Japanese shaft driven bikes"

"The service departments have a rough time keeping up with the demand of driveline failures on these machines."

Where do you come up with this crap?

Tell us you're just trying to be funny. The BMW part sort of lets the cat out of the bag.
 
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Checkswrecks

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There was another person that just recently made the same comment, as far rust. The consensus from the well experienced members was it was not an issue. I agree that it appears that the gasket is now gone, but it also appears that your shifter is missing too. I don't think it's even possible for a metal gasket to get "sucked" into the motor. Odd.

Edit: went back and found "the person". It was you. Sorry, I didn't pay enough attention. But, CW and Eric didn't feel there was a cause for concern. They're two of my go to people for anything Tenere. But, it's not my bike. Do what makes you comfortable. :)
Thanks Sierra1 -

Mikeal - As he noted, just clean it, move on, and have a great day. The ridge is a collection point for anything dripping from above and there is enough steel above that it is a known spot to collect a tinge of rust. As far as whether the gasket is visible, the criteria is whether it leaks or not and a leak would be very conspicuous.
 

RonH

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I looked at mine and thought about the issue here. Could a gasket that thin, even if it was steel and somehow got something really bad on it, could it rust enough to even see? No way. Gasket is so thin no rust could ever show on the engine covers. Came from somewhere else and just happened to sit there where it appears to be the gasket. It's not.
 

~TABASCO~

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Yes, it was my feeble attempt at humor. By the time I got to Red Loctite on the case bolts, I figured everyone would get it.

(SIDE FUNNY NOTE) I had a customer once bring be his brand new Tenere... Cant remember specifically why he brought it to me, but he took it upon himself to remove EVERY bolt he possibly could, and then put RED LOCTIGHT on everything. I was not far into his bike and said, NOPE. He was standing there and he said he has only owned Harley's his whole life. He told me- "when you bring them home you take it apart and add red loctight to every bolt and nut you can take off". I don't remember what was specifically said but I stopped working on the bike and kindly suggested he have not done that. Someone working on that bike in the future will have a SUPER FUN JOY on their hands....... LOL OMGosh !
Can you imagine, EVERY bolt and nut with red loctight.... EVERY ONE... he did a good job "eye-roll" LOL
 

StefanOnHisS10

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@~TABASCO~ That’s a PITA, damn those Harley drivers ;)...

I don’t think it would be a material that rusts. Usually the used metals are aluminium, copper, brass or a similar aloy. I make a lot of gaskets my self due to being in the oldtimer motorcycle, moped and car business. Never used plain steel. Maybe somebody else here does?

Stefan.
 
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