Oil leak - pickup rotor cover - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 12 (permalink) Old 08-01-2020, 09:47 PM Thread Starter
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Oil leak - pickup rotor cover

I have an oil leak that appears to be coming from the pickup rotor cover, where the wiring enters. Recently, I was in there to do valve clearance check. I used a new gasket and 8.7 foot pounds. Iíve ordered another new gasket. Anyone else have trouble in this area? Any gasket treatment - permatex? It seems it might be difficult for a metal gasket to seal with the rubber block for the wiring. The rest of the engine is dry. First panic was the valve cover gasket. (It took some time to soak the foam in the fairing and start to spot the garage.

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Ray

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post #2 of 12 (permalink) Old 08-01-2020, 11:01 PM
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When you go back together with that use some yamabond 4 around the electrical grommet. that will help
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post #3 of 12 (permalink) Old 08-02-2020, 12:43 AM
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I know many time we are told by the gasket manufactures .. no sealant needed .. I say bull..always get leaks ..I stopped believing them
Use a thin layer of Permatex grey or Black .. runs about 8 $$ for a tube ... works for all your gasket needs
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post #4 of 12 (permalink) Old 08-02-2020, 06:43 AM
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Quote:
Originally Posted by Way8lifter View Post
I know many time we are told by the gasket manufactures .. no sealant needed .. I say bull..always get leaks ..I stopped believing them
Use a thin layer of Permatex grey or Black .. runs about 8 $$ for a tube ... works for all your gasket needs
^ This. Every time.
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post #5 of 12 (permalink) Old 08-02-2020, 04:22 PM Thread Starter
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Thanks. I got some ďultra black.Ē Both sides of the metal gasket I assume? Back in my day, RTV, silicone bathtub caulk, was the only thing that kept the points dry.

Thanks all,
Ray

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post #6 of 12 (permalink) Old 08-02-2020, 07:32 PM
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You don't need sealer with that type of gasket however, as posted above (and likely in the shop manual) Yamabond sealer IS to be applied around that rubber grommet.

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post #7 of 12 (permalink) Old 08-04-2020, 02:25 PM Thread Starter
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Probably a dumb question, willing to take abuse. Where does the oil come from in the pickup rotor compartment? Run down the cam chain? And how/where does it return? Area is wet but no volume to speak of. Ive been looking for some kind of flow diagram, no luck.

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post #8 of 12 (permalink) Old 08-04-2020, 03:09 PM
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Quote:
Originally Posted by RERJr View Post
Probably a dumb question, willing to take abuse. Where does the oil come from in the pickup rotor compartment? Run down the cam chain? And how/where does it return? Area is wet but no volume to speak of. Ive been looking for some kind of flow diagram, no luck.
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.

.

Scott

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post #9 of 12 (permalink) Old 08-04-2020, 06:21 PM Thread Starter
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I have an FSM. Iíll look some more. Thanks.

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post #10 of 12 (permalink) Old 08-04-2020, 06:54 PM
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As said above, gravity and sling, no oil pressure in there. Gasket does have a wee strip of sealer on it, but always a little film of RTV on the grommet will fix you up.

Ray
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