Fork seal gone

Aussie Dave
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Re: Fork seal gone

Post by Aussie Dave » Sun Aug 13, 2017 8:14 am

G'day all, I cured my dust ring type new fork weeps with a light fine cross hatch sanding.....but lately I have noticed a weep ring on the left fork after a few rides......nothing that would leave a drop on the floor or even make it to the fork-axle mounts......but a light oil-dust ring.......right fork seal is squeaky clean.

My forks have just done 9,000kms..... all previous bikes (Japanese with USD forks) had fork seals last forever or until a stone chip got past the deflectors. It's just a nuisance for now.....and it was so good for sooo long...... :roll:

Yours read like they might have have had something damage the fork slider or get stuck in the oil seal grooves.

It may be possible to clean the seal.....or even lightly cross sand any scratches on the tubes, but oil on the floor sounds major.....

The dust cover can be pried off with a flat screwdriver blade and bare hands......maybe you can see some grooves (?) or a chip with sharp edges within the swept area.....that can cause the oil seal lips to be damaged if it is bad enough....(remove the front mud-guard to get a good look).
Current delights...1290GT-2017, CBR1100XX-2005

Prev loves...Capo1200TP-014, CBR11xx-002, 2xFZR1000genisis-94, FJ1200-89, FJ1100-84, XS1100P, VF1000F-83, CX500, VF750S, KZ1000J1-81, KZ1000ST-79, CB750F2-77, CB360T-74, CB175.. started it all in 1974 ;)

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Re: Fork seal gone

Post by todd » Thu Aug 17, 2017 3:35 am

I tried to clean it but it didn't help, no problems now it's already been fixed.

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Re: Fork seal gone

Post by Kool1290GT » Sat Sep 02, 2017 4:57 pm

My dealer told me that KTM uses some kind of oil dextros blah bhah from the factory and weeping is normal. they claim it should go away after approx 15kms.. i'm at 9kms now. I spotted it the day I got the bike. Is this just rubbish? I am thinking of putting a call into KTM to confirm. Sounds like BS.

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Re: Fork seal gone

Post by Aussie Dave » Sun Sep 03, 2017 7:57 am

G'day Kool1290.......

If you've only ridden 9 kms, I'd say wipe the grease rings off with a tissue or clean rag and see what happens.

Mine was a persistent faint weep over several thousand kms, that I traced down to a groove caused by some grit getting caught in the dust seal.......but yours (at that minimal mileage) will be the new bike grease working out of the seals (from the assembly grease used at the factory).

Just to be sure......shine a good light over the cleaned tubes and look for any up-down scratches.. ;)

Ps I've clocked up 9,650kms today.......but have been a little flu affected so haven't done any proper rides since cleaning that left fork dust seal......the slight ring I wiped clean this afternoon may have been WD40 that I used to clean the dust seal......though the right fork is dry and weep free......
Current delights...1290GT-2017, CBR1100XX-2005

Prev loves...Capo1200TP-014, CBR11xx-002, 2xFZR1000genisis-94, FJ1200-89, FJ1100-84, XS1100P, VF1000F-83, CX500, VF750S, KZ1000J1-81, KZ1000ST-79, CB750F2-77, CB360T-74, CB175.. started it all in 1974 ;)

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Re: Fork seal gone

Post by Kool1290GT » Mon Sep 04, 2017 10:30 pm

Thank you for the heads up I was he really appreciate it Aussie there's 9000 km on the bike that was a typo on my part. Your feedback gives me hope that there is nothing wrong with the forks and perhaps it'll just go away. However I am going to contact the dealer and make sure that it is logged

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Re: Fork seal gone

Post by Aussie Dave » Tue Sep 05, 2017 8:11 am

Cheers mate.... :)

I'm used to Japanese stuff and they never leak (err, unless the tube is pitted by a stone chip etc then you get a proper 'leak' all down the fork leg and onto the brake pads :x )..but I have seen the odd faint weep ring...which usually goes away quickly.....but not on a KTM it seems... :lol:

It's only a 'leak' if it runs down the tube......but it is a pissoff to see the rings for so long. Maybe WP fork seals don't fit as tightly as Nippon brands so they have less friction....I don't know....but I'd happily trade off some slippery action for no weeps/rings on a road bike... ;)
Current delights...1290GT-2017, CBR1100XX-2005

Prev loves...Capo1200TP-014, CBR11xx-002, 2xFZR1000genisis-94, FJ1200-89, FJ1100-84, XS1100P, VF1000F-83, CX500, VF750S, KZ1000J1-81, KZ1000ST-79, CB750F2-77, CB360T-74, CB175.. started it all in 1974 ;)

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Re: Fork seal gone

Post by DaveNZ » Wed Sep 06, 2017 9:28 pm

Aussie Dave wrote:
Tue Sep 05, 2017 8:11 am
Cheers mate.... :)

I'm used to Japanese stuff and they never leak (err, unless the tube is pitted by a stone chip etc then you get a proper 'leak' all down the fork leg and onto the brake pads :x )..but I have seen the odd faint weep ring...which usually goes away quickly.....but not on a KTM it seems... :lol:

It's only a 'leak' if it runs down the tube......but it is a pissoff to see the rings for so long. Maybe WP fork seals don't fit as tightly as Nippon brands so they have less friction....I don't know....but I'd happily trade off some slippery action for no weeps/rings on a road bike... ;)
Mine had a slight, not weep, but a smear of oil for about 1600Ks or so, but have been getting drier and drier, now 10,000Ks has passed, and are bone dry now.
2016 1290GT-remus link and muffler, 2010 Black 1200 Multistrada full Termi system with mapping, 2005 SMR 640, full Titanium system, Mikuni flatside racing carb, 2 sets of wheels, 18 litre tank, and a nice soft seat.

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Re: Fork seal gone

Post by Newjerseyduke » Wed Sep 06, 2017 9:59 pm

Mine had an oil sheen on the lowers for the first few thousand miles and now at 5 thousand it's gone.
2015 SDR 1290

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Re: Fork seal gone

Post by AllanP » Sun Sep 10, 2017 2:34 am

My 2016 model bike now has 12981km/8113 miles on it since I bought it at the end of February 2017, and the left fork leg has wept oil since day one. This is a picture after my recent 4160km/2600 mile road trip. The bike was very clean before I started but by the time I finished, oil from the fork had made its way back to the left brake caliper. The workshop manual says this fork has 670ml/22.65 fl.oz. of SAE-4 oil in it which is a lot but it must be pretty depleted by now.

The bike goes into the dealer to have both fork oil seals replaced, the steering head bearings checked (again) and the semi-active damping unit replaced next week.

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Re: Fork seal gone

Post by Aussie Dave » Sun Sep 10, 2017 7:37 am

G'day Allan..

I'm thinking that qualifies as a leak now.....but you'd be amazed by how little actually seeps out - unless it is pouring out - like the time my CBR1100xx had one of the fork tubes damaged by a stone (dodged the oem protector and left a sharp edged chip, which tore the fork seal lips, which,......oh you know ....allowed oil to gush out down the fork leg and onto the brake pads before I spotted the problem :roll: )....yeh well, two new seals (& tube surface sanded) and a set of F- pads and new fork oil for both sides fixed that.....and some extra stone protectors... :lol:

Hey, been reading on the forum......the early 2016GT's WP suspension has different internals to the 2017 stuff (different p/nos on the list) - explains the complaints about "hard suspension" on 2016 models in contrast to my 017GT which has good suspension.....

For anyone else (as your Gt is booked in) If your local guys won't do warranty on the seal you should remove the front mudguard and pop the dust seal out and check for any vertical scoring - a light cross hatch with some used fine grit paper might fix the weep - for anyone attempting this it is best done with WD40 on the old/used sandpaper and take care not to do too much cross sanding.....and clean the dust seal with the WD40 and a rag ;)

My left fork seal is playing up also.....but it is still only a fine weep that takes a couple of rides to create a dust weep ring......annoying.....but I'll have another go at it one day soon, fixed it ages ago, but it's come back to haunt me again..... :roll:.......must be a WP thing.....
Last edited by Aussie Dave on Wed Sep 13, 2017 7:30 am, edited 1 time in total.
Current delights...1290GT-2017, CBR1100XX-2005

Prev loves...Capo1200TP-014, CBR11xx-002, 2xFZR1000genisis-94, FJ1200-89, FJ1100-84, XS1100P, VF1000F-83, CX500, VF750S, KZ1000J1-81, KZ1000ST-79, CB750F2-77, CB360T-74, CB175.. started it all in 1974 ;)

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Re: Fork seal gone

Post by AllanP » Mon Sep 11, 2017 4:19 am

Hi Dave,I agree that a little oil makes a big mess and can look worse than it is. I have checked the fork tubes for dings and scratches very carefully but they're unmarked, I've also had the seals cleaned, but the fork has leaked oil from the first day I rode it.

I never pressed KTM hard to do something about this oil leak because I was always hoping for a way to improve the suspension damping which is harsh, noisy and unsettled on my bike. If a fix was found I thought changing the oil seals would be a simple job that could be done at the same time.

Handing on a bike is way more important to me that a powerful engine and I even looked at the possibility of changing the semi-active suspension for the conventional units from a SD-R but this seemed impractical. There is almost no knowledge base for semi-active suspension use on motorbikes compared with conventional units and I knew I was taking a risk with this but perhaps I'll get a nice surprise with the update. I've got my fingers crossed.

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Re: Fork seal gone

Post by furndog » Mon Sep 11, 2017 3:43 pm

AllanP wrote:
Mon Sep 11, 2017 4:19 am
I knew I was taking a risk with this but perhaps I'll get a nice surprise with the update. I've got my fingers crossed.
What update is this Allan? My suspension is harsh too can't relax your hands on the bars afraid the next manhole cover you hit will knock the bars out of your hands.
Good luck, have fun, and don't break anything

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Re: Fork seal gone

Post by AllanP » Mon Sep 11, 2017 4:43 pm

furndog wrote:
Mon Sep 11, 2017 3:43 pm
AllanP wrote:
Mon Sep 11, 2017 4:19 am
I knew I was taking a risk with this but perhaps I'll get a nice surprise with the update. I've got my fingers crossed.
What update is this Allan? My suspension is harsh too can't relax your hands on the bars afraid the next manhole cover you hit will knock the bars out of your hands.
No update yet. The bike goes into the dealers tomorrow to have the work done including the new damping unit and I will also be asking about any software updates. It should be in there for about a week (crosses fingers) and I may get to ride it again next weekend after which I will post an update.

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Re: Fork seal gone

Post by Aussie Dave » Wed Sep 13, 2017 7:50 am

Cheers all......another forum member posted somewhere in here.....that the part #'s were different between 16-17 MY's...... the internal's were different.....maybe that means different oil shims in the stack or more ......but wouldn't it be nice if all it took was a software download eh? 8-)

Whatever is in the 016 forks is not what is in the 017 units as my forks are nice (ie not harsh) - the rear was hard to tune in when it was new.....but once it had done a few 000kms it settled & I found settings that worked - I've even been using sport damping settings :o (they were rock hard when new).

I suppose it couldn't hurt to ask the head tech'o if KTM offer a conversion to upgrade any harsh early model fork internals to later model specs.....oh sorry....am I dreaming again?..... :lol:
Current delights...1290GT-2017, CBR1100XX-2005

Prev loves...Capo1200TP-014, CBR11xx-002, 2xFZR1000genisis-94, FJ1200-89, FJ1100-84, XS1100P, VF1000F-83, CX500, VF750S, KZ1000J1-81, KZ1000ST-79, CB750F2-77, CB360T-74, CB175.. started it all in 1974 ;)

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Re: Fork seal gone

Post by MR C » Thu Sep 14, 2017 10:45 pm

Strange because my first gen 16 bike has lush forks, I'm using 3/4 travel and feels great .

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Re: Fork seal gone

Post by DaveNZ » Fri Sep 15, 2017 6:43 am

MR C wrote:
Thu Sep 14, 2017 10:45 pm
Strange because my first gen 16 bike has lush forks, I'm using 3/4 travel and feels great .
Same as mine, if anything, i find the GTs suspension on the soft side, i think this is why I'm going through tires far faster than i did on the 1290R. May be just a few early models had something wrong with the internals or the software, i remember chatting to Yousy in the April forum, and he hated his GTs harsh suspension so much he traded it on a Multistrada.
2016 1290GT-remus link and muffler, 2010 Black 1200 Multistrada full Termi system with mapping, 2005 SMR 640, full Titanium system, Mikuni flatside racing carb, 2 sets of wheels, 18 litre tank, and a nice soft seat.

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Re: Fork seal gone

Post by mick shere » Sat Sep 16, 2017 12:20 pm

surely they cannot just say its not covered by warranty on any new bike, let alone ones as dear as these! Have you approached KTM themselves?

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Re: Fork seal gone

Post by AllanP » Tue Nov 21, 2017 1:56 am

I've done 704 miles/1126km on my 2016 bike since KTM replaced the fork internals on both sides plus the oil seals. The suspension is miles better than it was when the bike is new, but the fork seals still weep a little oil.

I'll keep my eye on it and hope it stays as just a small weep.

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