Rear Suspension Service - Yamaha FJR Forum : Yamaha FJR Owners Forums
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  • 2 Post By justacrossthehill
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post #1 of 8 (permalink) Old 09-14-2020, 07:27 PM Thread Starter
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Rear Suspension Service

I've read where people said the bearings in their rear suspension were improperly lubed from the factory so at 19000 miles, figured I'd better have a look at mine. As stated, everything in the relay arm was almost void of grease. Dropped the swingarm while I was in there and it was in fine shape but I lubed it anyway.
I always grease the suspension on my FZ1's when replacing the chains but have never found one of those as dry as the FJR was. Had I put this off very much longer I would have been buying some expensive parts.
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post #2 of 8 (permalink) Old 09-14-2020, 10:19 PM
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Bearings require very little grease. Just because there is more room for grease does not mean the bearings were insufficiently lubricated.

Did you replace bearings? If not, they were not damaged? So perhaps there really was enough grease?

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post #3 of 8 (permalink) Old 09-14-2020, 11:40 PM
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Rear Suspension Service

Quote:
Originally Posted by justacrossthehill View Post
I've read where people said the bearings in their rear suspension were improperly lubed from the factory so at 19000 miles, figured I'd better have a look at mine. As stated, everything in the relay arm was almost void of grease. Dropped the swingarm while I was in there and it was in fine shape but I lubed it anyway.
I always grease the suspension on my FZ1's when replacing the chains but have never found one of those as dry as the FJR was. Had I put this off very much longer I would have been buying some expensive parts.
Just,

This FJR rider installs Zerk fittings in the relay arm: nice workmanship, and very easy to lube the bearings then. He has been getting the relay arms in used, and rebuilds them as may be needed, with Zerks added. I got a relay arm from him, for a Winter-work project. You might want to get a reworked relay arm from him, or send yours in to him for the work. You may need to log in at that FJR website, to see his stuff.

https://www.fjriders.com/forums/view...t=4676#p108257
.

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post #4 of 8 (permalink) Old 09-15-2020, 04:11 AM Thread Starter
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Quote:
Originally Posted by N4HHE View Post
Bearings require very little grease. Just because there is more room for grease does not mean the bearings were insufficiently lubricated.

Did you replace bearings? If not, they were not damaged? So perhaps there really was enough grease?
No, I didn't replace any bearings but if I'd had everything at the center pivot point in the relay arm, I would have replaced those. The shaft there was showing some wear and hope I caught it just in time. IMHO, my bearings were insufficiently lubricated but they aren't now.
The needle bearing in the swingarm was loaded with grease. Don't understand why that one was so well lubed when so little was in the relay arm.

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post #5 of 8 (permalink) Old 09-15-2020, 04:45 AM Thread Starter
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Quote:
Originally Posted by red View Post
Just,

This FJR rider installs Zerk fittings in the relay arm: nice workmanship, and very easy to lube the bearings then. He has been getting the relay arms in used, and rebuilds them as may be needed, with Zerks added. I got a relay arm from him, for a Winter-work project. You might want to get a reworked relay arm from him, or send yours in to him for the work. You may need to log in at that FJR website, to see his stuff.

https://www.fjriders.com/forums/view...t=4676#p108257
.
Yes, I saw that and it's a great upgrade for the relay arm, may do it sometime.
Now that I have devised a good way to pick up my bike and have the center stand installed so it can easily be removed, it really isn't that bad of a job. The bike would still need to come apart to lube the driveshaft splines, center stand and shifter pivot points and grease the swingarm needle bearing. Guess a fitting could be added there too if desired.

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post #6 of 8 (permalink) Old 09-15-2020, 07:56 AM
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Many years ago in a life far, far-away, working at a machine tool company (south bend lathe) I was the guy that built their CNC spindles and working with the Bearing companies they were all adamant that to much grease in a quality ball or roller bearing was as bad or worse than no grease at all, but the applications are a bit different with the spindle bearings a high speed app vs a pretty much static deal on the swingarm, relay arm and splines.

I tend to over lube things myself, just one of those things I guess, so you can file this in the useless trivia file.

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post #7 of 8 (permalink) Old 09-15-2020, 08:03 AM
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From my experience, most FJR's don't have enough lube at the factory to prevent water intrustion and corrosion. Best remove it early in life and grease all the bearings and pivot points. One must remove the centerstand and relay arm to do the front pivot, but once lubed it is less exposed. The lower exposed ones including the shock mount will need it more often.
IMHO one only needs a zerk on the front one so you don't have to remove it, all the others are servicable without removal of the centerstand.

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post #8 of 8 (permalink) Old 09-15-2020, 08:47 AM
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Quote:
Originally Posted by RaYzerman View Post
From my experience, most FJR's don't have enough lube at the factory to prevent water intrustion and corrosion. Best remove it early in life and grease all the bearings and pivot points. One must remove the centerstand and relay arm to do the front pivot, but once lubed it is less exposed. The lower exposed ones including the shock mount will need it more often.
IMHO one only needs a zerk on the front one so you don't have to remove it, all the others are servicable without removal of the centerstand.
Yepper Ray, water intrusion is the real issue here. It carries in dirt and causes rust which will kill the bearings. If it werent for that theyd run forever w/o any grease at all.

Steve P
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