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  • 1 Post By F70X
  • 2 Post By Rainerio
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March 19th, 2018, 05:23 PM   #1
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Joined: Oct 2017
From: New Zealand

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I Ride: 10 FX 450,15 KTM EXC 500
70 degree Shift Shaft oil leak

Howdy All,
Looking into older threads, on the forum, this is a inherent problem with 70 deg bergs. But there is no definitive solution posted. So I thought I would tap into any thoughts.
Oil leaking from where the shift shaft spline comes out.
The shift shaft has a shaft seal ring (ktm #0760142460) which is a standard part.
I ordered a new seal and replaced the old one, which was a difficult job to remove and replace as it is a very tight fit. But the problem persists. I was thinking of replacing the seal again and putting some high temp, oil and fuel resistant, RTV behind the seal.
Any other ideas welcome, the leak is at its worst during operation when the oil is thin and the case is hot.
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March 19th, 2018, 11:31 PM   #2
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Joined: Jun 2013
From: San Francisco CA. USA

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I Ride: 8 Berg’s 2005-2011 2 Husky’s 1986&7 2009 Buell & 2006 Ducati
Only thing I can think of is did Grease the inside of seal. I always Grease them.
Thanks from tourist and F70X
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