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  #1  
Old 05-13-2016, 01:19 PM
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Default KTM exc 250 06 Front shocks are KILLING ME!

     

Hey everyone,
Rebuilt my front forks like 5 times, bought all new seals like 5 times, still leaks oil after like 5hours of use everytime i rebuild them, checked for imperfections on the fork itself, everything is smooth and clean.
Any ideas why fork is leaking oil only after 5 hours of use? (brake side of course)
Got to change front brake pads because of severe soaking in oil, just replaced the pads and rebuilt the forks again.. the problem accurred again, brake pads full of oil, oil is dripping from the fork (seals).

Maybe I should have changed some inner spacers that are in the open chamber forks? ?
PLEASE HELP!!
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Old 05-13-2016, 02:18 PM
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When you changed them did you replace the the bushings? Worn bushings will cause the seal to wear faster than normal.
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Old 05-13-2016, 08:14 PM
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Just past where the inner bushing sits there are 2 holes in the inner fork tube. If you are using a fork seal bullet, sometimes they don't push down far enough to cover the holes. Those holes can have burrs that damage the seals when you install them. I usually use light sand paper to clean the holes up and try to make sure they are covered by a bullet or tape when installing the oil seals. That could be where your seals are getting nicked.
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Old 05-14-2016, 09:34 AM
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Check for burrs and damage and use skf seals, they have less stiction and they are more durable.
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Old 05-14-2016, 01:49 PM
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Are you aligning the forks upon installing and torquing down the axle?
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Old 05-14-2016, 09:30 PM
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I have this problem all the time trash getting in seal and leaking make or buy a tool to run around zsal and clean trash and it will seal back up.
I use a piece of plastic from a butter bowl ,cut a out 2 inches wide and 4 inches long
With a small hook on one end , put bike on stand ,slide wiper seal down spray with either or brake cleaner, prie tool inbetween ssal and fork tube ,run around twice, remove tool , spray off again pull bike of stand pjsh forks down abojt 3 times check for leam if still leaking do again
It works

---------- Post added at 09:30 PM ---------- Previous post was at 09:29 PM ----------

Sorry about spelling big fings little phone
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Old 05-15-2016, 04:11 AM
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Quote:
Originally Posted by OlSchoolFool393 View Post
I have this problem all the time trash getting in seal and leaking make or buy a tool to run around zsal and clean trash and it will seal back up.
I use a piece of plastic from a butter bowl ,cut a out 2 inches wide and 4 inches long
With a small hook on one end , put bike on stand ,slide wiper seal down spray with either or brake cleaner, prie tool inbetween ssal and fork tube ,run around twice, remove tool , spray off again pull bike of stand pjsh forks down abojt 3 times check for leam if still leaking do again
It works

---------- Post added at 09:30 PM ---------- Previous post was at 09:29 PM ----------

Sorry about spelling big fings little phone
You can buy them now.

"Seal Doctor"
Motocross Tools & Dirt Bike Accessories Online Australia - MX Store

Great Tip though.


A mate had issues with his 04 YZ250 forks. Fitted SKF seals. Issue gone.
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Old 05-15-2016, 01:10 PM
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agree with everything said above, check the forks to be in good working order and definately after every ride (especially after muddy conditions) check the seals because mud penetrates through the scraper and sticks onto the seal!
also if you leave mud onto the fork leg to dry up, it will leak right away on the fist bump.
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