Fork Seals Driving Me Nuts - MVAgusta.net
 
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post #1 of 8 (permalink) Old 12-01-2013, 10:43 AM Thread Starter
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Fork Seals Driving Me Nuts

Trying to upload pics but file size for forum says may 1.43MB. Wish someone can increase this, dont know how anyone can upload pics with max file size so tiny.

Anyway, any help with my fork deal dilema would be much appreciated. 2007 F4... local shop changed fork seals twice and still leaking. First time, the mechanic thought the purchased seals were bad plastic now he seems to think the anodizing wear could be the problem.

The tubes look good to me, maybe a tad bit of wear on the black. Always stored inside of course, 9000 miles, no pitting, etc.

Any ideas anyone...will I need to buy new forks???

Phil
Oklahoma via US Army
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post #2 of 8 (permalink) Old 12-01-2013, 11:07 AM
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Phil, what manufacture seals are being installed?
Over the years I have found motorcycle fork seals work best with OEM parts.
Kawasaki, Honda, HD, Ohlins, Suzuki, Marzocchi etc.
Just checking. As some aftermarket seals for cars and bikes are junk.

Ed
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post #3 of 8 (permalink) Old 12-01-2013, 11:24 AM
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Phil,
Did they change your forks seal with oem forks seal or different brand? have they sand down inside tube little? what is the fork oil? 5w, 7.5w, 10w, 15w, 20w? brand? I bought my forks seal from
http://www.amazon.com/Pyramid-Parts-.../dp/B005IPJN5U,
and the guys use Motul 7.5W for my set up
http://www.mvagusta.net/forum/showth...ight=fork+seal


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post #4 of 8 (permalink) Old 12-01-2013, 02:49 PM
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Demand a refund and take it to a qualified suspension shop.
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post #5 of 8 (permalink) Old 12-01-2013, 07:25 PM
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Usually a recurring fork seal problem is the result of some other component being worn or damaged.
If new OE (Marzochi) seals are used and they begin leaking again shortly after you have something else wrong.
Mechanic error
Damaged inner tube (pits, nicks)
Worn guide bushings....etc.

Your inner tubes can be replated if the coating is worn with sharp edges tearing the seal surface. You can usually feel this roughness with your fingers. If it is slick and smooth (even if worn) then that probably isn't the cause.

I used to be fast....now I just dream about it.
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post #6 of 8 (permalink) Old 12-01-2013, 08:20 PM Thread Starter
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Thanks guys for the input. Will contact mechanic and ask what type seals and oil, kinda thought any aftermarket seal and oil would do on this job.

They did not charge me the 2nd time, and yes, I should ask for a refund but I dont want to ruin my rapport with this shop since its the only place in town in this shit hole I am currently living in (Lawton, OK).

Tubes are smooth so I can check that off. Don't even know what "guide bushings" are??

Thanks again for the advice guys....
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post #7 of 8 (permalink) Old 12-02-2013, 05:26 AM
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Guide bushings are the sliding surfaces the fork tube actually moves on. One in the outer tube and on on the inner tube. They wear and then you get movement in the inner tube that distorts the seals.

Common renewal parts when rebuilding front suspension..

I used to be fast....now I just dream about it.
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post #8 of 8 (permalink) Old 12-02-2013, 10:56 AM
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HI, it's better to store the bike (for winter for exemple) with no load on the front (stand under the steering axle), it's a good help to last Ohlins bushings who are made in teflon for some bikes ; otherwise the seals dead quickly.
Another trick , put a little amount of neutral grease under the dust cover above the seals...
Cheers

If you are confortable with your bike, you are not fast enough ! John Kocinski
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