Oil leak front counter shaft sprocket

[medicman]

Hey guys after a long brutal ride I noticed oil leaking from the front counter shaft sprocket. I ordered a new seal & coller. Iam not sure what to really replace? I was able to get the sprocket and the steel coller out, where is the seal? Basiclly iam asking " how do i fix this" thanks matt

[jfabmotorsports.com]

You need the "O"ring between the collar and the gear. I also use a little RTV on the splines to keep the oli from running out between the collar and the shaft.

JFAB

[KX500freak]

the seal must be visible after sprocket and collar are removed,if not ,it,s still dirty ?
then get some little screw,insert it into the seal ,then jank it right out ,clean up and insert new seal gently ,
use the old seal exact over the new one to give the new seal a ferm final tick in place with a small rubber hammer  .

[jfabmotorsports.com]

Im betting he has a star shaped pattern of oil on the sprocket. Pattern lines up perfectly with splines on shaft.

[KX500freak]

youre definately right jerry ..
actually i do have m on one of my bikes too ,but i didn,t took action yet because its so minor 
they look like ninja stars

[medicman]

Is the seal the the outer rubber piece that i can see with the sprocket removed?

[jfabmotorsports.com]

Yep

[medicman]

ok guys sorry to keep bothering you, When oil is leaking from the counter shaft sprocket is it the outer large oil seal i replace or the inner O ring?

[cbxracer30]

Start with the Oring and if that doesn't stop the leak then do the seal, or solve the problem for sure just replace them both at once , I bet you can buy them both for less than $10. CBX