400ex leaks oil at front sprocket

[redhondi400]

Ok my 02 400ex leaks oil around the shaft on the front sprocket. My question is do I need to crack the case open to replace the bearing and oil seal?

[Colby@C&DRacing]

you will only need the output shaft seal and this can be changed by taking the sprocket off and use a couple of pics to pull the seal.

[redhondi400]

thanks for the help

[gojk]

Originally posted by Colby@C&DRacing
you will only need the output shaft seal and this can be changed by taking the sprocket off and use a couple of pics to pull the seal.

This is the first time I have ever heard this. Mine has done this for a long time and everyone I have talked to said it had to be split to replace it. So I have just been living with it. I will have to try replacing it.

[leasureryan]

or you can run a small self tapping drywall screw into it, and pull it right out