Oil Leak KTM 525 EXC

56BelAir · 07-09-2008, 08:40 PM

I have an oil leak on my bike where the countershaft sproket goes. I replaced the seal and it still leaks the same amount if not more. It is a bad leak, not just a few drops. Any ideas on exactly what parts need replaced besides the seal itself?

Paul
Parker, CO

56BelAir · 07-26-2008, 08:35 PM

I replaced my counter sprocket seal for the second time. Originally the leak was really bad. After I replaced the seal the first time the leak was really, really bad.

This is the second time I replaced it. I cleaned the seal, the shaft, and the casing where the seal seats. This time I put a little light coating of RTV black around the seal in an attempt to help.

I am trying to find out if an oil leak from this area is a known problem. If it doesn't get fixed this time I will go ape sh!t. I also replaced the o-ring, and lubed the seal with a light coat of oil.

Thoughts?

Paul
Parker, CO

exc92 · 08-08-2008, 01:22 PM

I have a 250 exc., IM so glad im not the only one that the countershaft sporocket seal leaks.It started out ,a slow leak.the seal look good.I carefully removed everything, Cleaned the shaft with wd40,Lightly greased shaft and seal,It still leaked.Now I've put a new seal on,and now,it leaks worse.It SUCKS! I have no idea what to do now.And its all over a simple countersprocket seal getting replaced.Ive done topends,a little in total engine teardowns,and I know my way around a motorcycle.But this leak is about to drive me crazy.Would having too much oil in crankcase cause this?

56BelAir · 08-09-2008, 11:51 PM

I put RTV black around the perimiter of the seal. That seemed to do the trick. That was the second time I replaced my seal. When I replaced it the first time I made it worse somehow.

WHITECA · 09-16-2008, 03:02 PM

Quote:

Originally Posted by 56BelAir

I have an oil leak on my bike where the countershaft sproket goes. I replaced the seal and it still leaks the same amount if not more. It is a bad leak, not just a few drops. Any ideas on exactly what parts need replaced besides the seal itself?

Paul
Parker, CO

I am having the same problem with my 2007 525exc. I have replaced the shaft seal and the leak has slowed, but has not stopped.

Like paul, I would like to know if there is another solution for this leak.

Thanks,

WhiteCa