With model 2-stroke engines, some leakage is absoutely NORMAL. If you store your engine nose-down, then all the fuel residue/after-run oil in the crankcase will wind up either dribbling out the carburetor or through the front bearing. That's why I've always tied a rag around the front of the engine where the drive washer meets the case...or made some other arrangement to catch the drips. If anybody thinks these engines should be "dry", they need to spend a LOT more time working with them to learn about how they work.

You HAVE to have some oil pass through the front bearing to get it lubricated. As was stated in an earlier post, if your engine's running well, the leak's not serious to worry about. If the nose of the model is being wet with raw fuel, then the leak's worth worrying about. If you can just notice there is a leak, then forget about it.

The seal is not made by the bearing. The seal is made by the close fit between the crank and case between the carb and front bearing. If raw fuel is spraying out and the engine's operation is compromised or fuel consumption has gone 'way up, then the crank, case, or both need to be replaced to stop it.