Oil leak - pickup rotor cover - Page 2 - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #11 of 21 (permalink) Old 08-04-2020, 07:22 PM
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Quote:
Originally Posted by TownsendsFJR1300 View Post
Oil is pumped up to the camshafts, obviously comes out (oils valve springs, etc) and via gravity/moving parts, is slung about and down (into the cam chain, clutch, etc) area's..
It eventually drops / returns, (again gravity) to the crankcase.
Your Yamaha shop manual should have the oiling diagram.
.

In addition to that, the outer main bearing of #4 cylinder is right there behind the lower cam chain sprocket and while running, oil is constantly squeezing out from there to then drain back into the crankcase.
Clearly there is quite a bit oil going through that area..

I've got a Yam Service manual and it does have some good schematics of the oiling system....
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post #12 of 21 (permalink) Old 08-11-2020, 07:57 PM Thread Starter
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Thank you all. I scraped all surfaces with plastic razor blades. Wiped them down with brake clean. Oh, I pulled the grommet and cleaned it with the other surfaces. Ultra Blacked the grommet to case. Put a smear of ultra black on the grommet surface that meets the metal gasket, installed gasket and hand tightened the bolts. Dry. I reused the same metal gasket as I got tired of waiting. Why is everything so hard.

Thanks again,
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2013 FJR1300A #337
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post #13 of 21 (permalink) Old 09-12-2020, 10:57 AM Thread Starter
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Well, the leak is back. Canít believe it. I will trying again tonight/tomorrow.

2013 FJR1300A #337
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post #14 of 21 (permalink) Old 09-14-2020, 09:39 AM
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What do you mean by metal gasket... I only know of the special paper one.... sounds like time for a new gasket and a smear of RTV on the grommet.
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Ray
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post #15 of 21 (permalink) Old 09-14-2020, 10:58 AM
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I restore vintage bikes and on my Z1900 bikes the electrical grommet has always been a problem. Recently I decided to use a product I use on my boat Its a sealer used for sealing the bellows on a lower unit and is called bellows sealant. You can get it at most boat stores.
https://www.mercruiserparts.com/8616...hesive-bellows
The stuff is super tacky and has stopped many leaks besides the grommet leaks. I think it is better in an oily area that RTV.
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post #16 of 21 (permalink) Old 09-17-2020, 07:25 PM
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Ever consider replacing the rubber grommet? Rubber hardens and shrinks with deterioration/breakdown.

Stock 2008 Yamaha YZF-R6S Blue >60k miles
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post #17 of 21 (permalink) Old 09-17-2020, 07:40 PM Thread Starter
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I had a heck of a time getting the valve cover on after the valve check.I just noticed oil in a valley of the frame just above the pick-up cover. I now suspect a valve cover leak that is running down the frame. Initially I suspected a valve cover gasket but everything looked clean. It is difficult to see along side of the engine. Tank will come off again when I run the fuel down.

Thanks for putting up with me.
Ray

Cra-Z1 - I had a 1976 KZ900. Bought new in Fall of 1975. Wish I still had it.
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2013 FJR1300A #337
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post #18 of 21 (permalink) Old 09-17-2020, 09:51 PM
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Quote:
Originally Posted by RERJr View Post
I had a heck of a time getting the valve cover on after the valve check.I just noticed oil in a valley of the frame just above the pick-up cover. I now suspect a valve cover leak that is running down the frame. Initially I suspected a valve cover gasket but everything looked clean. It is difficult to see along side of the engine. Tank will come off again when I run the fuel down.

Thanks for putting up with me.
Ray

Cra-Z1 - I had a 1976 KZ900. Bought new in Fall of 1975. Wish I still had it.
I think you need this https://tinyurl.com/y65snakc
florescent dye and you need the light and goggles for another $15 you will beable to see all
sources of leaks

2010 FJR 1300
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post #19 of 21 (permalink) Old 09-17-2020, 09:58 PM
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Had similar issues with oil leaking from the valve cover post-service on my YZF. I actually bought a new valve cover gasket to install. Comparing the old to the new, didn't really see enough of a difference. So I used silicon spray to perfect the old gasket + double/triple check the mating surfaces on the valve cover head. Made sure it was everything was perfectly aligned for installation. Leaks ceased. New gasket stored away for later use.
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post #20 of 21 (permalink) Old 09-18-2020, 08:51 AM
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Gunsight down the end of the valve cover to ensure the two half moons are seated...
Can try to feel along the front edge to see if seal had slipped out of the groove when installed. Might even be able to shine a flashlight along the front edge but you'll have to remove the side fairing.
Can also use foot powder spray to detect oil leaks.
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