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KTM Two Stroke KTM Two Stroke
5/17/2020 5:03 AM

Had my WP Cone Valve out for Service/Rebuilt by a WP Service Center .
New 48 Springs , Cones , Cone Adapter , Seals , Sealholders new for 750€.
Last week after the first ride i notice oil leack on both sides

I thought it comes from the Bleeder Screw so i replace them but it wasn‘t.
For me it Looks like it comes from the Preload Adjuster
Any idea what can be wrong?
Tomorrow i call the WP Service

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CarlinoJoeVideo CarlinoJoeVideo
5/17/2020 8:47 AM

Is there the rubber o ring on the bleed screw?

Bummer, might just have to call who did the service.

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AJ565 AJ565
5/17/2020 9:16 AM

Mine do the same thing. When I asked Billy at Powerband about it he said it’s pretty normal and if they rebuild that part it still might do it. He had me turn the preload in two turns then out two turns to help set the seal. It worked on one side and helped on the other. It’s just a seep and doesn’t run down the fork or anything.

2018 KTM 250sx
Instagram CamaroAJ

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KTM Two Stroke KTM Two Stroke
5/17/2020 11:02 AM
CarlinoJoeVideo wrote:

Is there the rubber o ring ...more

Yes O-Ring was new

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SeaClassExpert SeaClassExpert
5/17/2020 12:53 PM

God damn it, I have the exact same leak. WP considers this normal?

If it can't be fixed with a hammer, it's an electrical problem.

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RockyRider RockyRider
5/17/2020 12:59 PM

It's the o-ring where you unscrew the valving stack from the cartridge. Might have pinched it when they put them back in

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5/17/2020 2:14 PM

Not normal. My 2018 CV had service 3 times since I bought it new, never leaked at this place.

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CarlinoJoeVideo CarlinoJoeVideo
5/17/2020 4:26 PM
WEAL wrote:

Not normal. My 2018 CV had ...more

I’ve never had that leak either.

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KTM Two Stroke KTM Two Stroke
5/17/2020 10:19 PM
AJ565 wrote:

Mine do the same thing. ...more

I will try this for the next ride tomorrow, if not i take it back to WP Service

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captmoto captmoto
5/17/2020 11:44 PM

So I'm guessing about $4000 USD for forks and service and leaking is normal?

The older I get, the faster I was.

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DynoDan22 DynoDan22
5/18/2020 6:43 AM

I'm surprised Billy at Powerband said the leaking was normal. I'm not doubting what the poster said, but From what I see, he knows his stuff. If my CV's were leaking there after a service, I'd wouldn't take "it's normal to leak there" as a acceptable answer. lol

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slipdog slipdog
5/18/2020 6:57 AM

WP forks with preload adjusters are known to leak at the PL adjuster o-ring as far back as the early 2000s open cartridge forks. That said I'd agree with RockyRider, it looks like the o-ring for the compression adjuster that is leaking.

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KTM Two Stroke KTM Two Stroke
5/18/2020 12:48 PM

I call the WP Dealer today he recommend try to
re-tighten the Preload Adjuster Ring on the top .
According to him its a common Problem on CV Forks that this Ring come loose .
I will see tomorrow if its sealed

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