my friends 300ex has some problems, I think
If you start the motor and push on the front sprocket ( push it in )
there is air comming out the seal. no oil or anything just air. if you pull on the sprocket it stops.

It that normal??? I was thinking the seal was just shot but then there would be oil comming out to right???

I told him as long as there was no oil he didn't have anything to worry about. Cause if oil can't come out there is nothing that can go in.

What do you think?