Fork Seals frequent leaks - Triumph675.Net Forums
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post #1 of 6 Old 03-16-19, 10:09 Thread Starter
Plasmablaster
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Fork Seals frequent leaks

Ever since I got this bike I've been having my fork seals leak after a relatively short time after replacement - on average a year or even less, with an average mileage of 5ooo miles inbetween leaks. So far I've changed them about three times, since December 2015. They don't leak both at the same time of course, I just replace both of them whenever one of them leaks.

Is this the same for you guys?

Those of you who manage higher mileage, what seals do you use?

Also, someone told me of a tool that dirtbike riders use that cleans internally the dust seals and this -supposedly- helps prolong the longevity of the oil seals. Is there such a tool for us street guys?


Thanks in advance for any answers.
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post #2 of 6 Old 03-16-19, 16:38
ShaLaMae
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I personally have had no issues with my seals. I have a Daytona R and have changed the fork oil 4 times without replacing the seals.

The tool you are asking about is like a film negative with a hook on one end. It's for removing dirt stuck inside the seal. It won't help unless your seal is dirty.

Do you do a full service when you change the seal?
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post #3 of 6 Old 03-16-19, 22:49
MGFChapin
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Could be a sign of worn fork tubes. Any visible pitting? Any possibility theyíre bent?
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post #4 of 6 Old 03-17-19, 03:56
MacBandit
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Also after you install the axle you need to pump the forks (work the suspension) so that the width at the axle is equal to the from width. You then torque the axle clamp. This prevents stiction when the forks go in and out but also it prevents fork seal leaks. If the forks are pinched together at the bottom w they stuck to the axle when it was torqued the as they go in and out they will bind pinching into one side of the fork seals and causing a leak. Iíve fixed a lot of fork seal leaks simply by loosening the pinch bolts pumping the forks and retorqueing.
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post #5 of 6 Old 03-18-19, 09:11 Thread Starter
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Thanks a lot guys.

If by "full service" you mean change of dust seals & change of the oil, then yes, I always do them. I finally found what I was looking for:


https://www.ebay.com/itm/SEAL-DOCTOR...5dab%7Ciid%3A1



Thankfully there's no sign of pitting. I'll have the sliders (maybe the term is different - I mean the teflon-coated metal rings that bear the mechanical load between the tubes) changed because from experience, if they're worn, seals wear out faster than normal and also I'll follow your advice @MacBandit about correct alignment of the fork tubes. I thought that should only be done before tightening the brake calipers. So the procedure is that the axle gets screwed in, the forks are pumped and after that the pinch bolts are tightened, and then after some more pumping the calipers are finally tightened right?
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post #6 of 6 Old 03-18-19, 11:14
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No the calipers donít affect it. You can align the calipers though. After you tighten the pinch bolts hold the brake lever gently and tighten the caliper bolts.
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