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Could this be a problem?


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A lot of dealers carry that.  You should replace the shaft oil seal, the shaft water seal, and the shaft bearing at minimum.  You should probably also buy a new right side crankcase cover gasket.  You might need a shaft as well. 

 

Read these two posts:

 

https://thumpertalk.com/topic/841710-04-450-coolant-leak/

 

https://thumpertalk.com/topic/691433-repeat-failures-of-water-pump-seals/

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Risky riding it. I wasn't willing to roll the dice and spent a day I planned on riding to fix it. Hot Rods make a rebuild kit that includes the seals, bearing, and water pump cover gasket for less than 20$. Oem at my local shop was over 40$ and they only had one of the seals on hand.

I was able to reuse my right side cover.

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It isn't for warning purposes.  The reason it's there is to prevent oil or coolant from contaminating the other fluid volume.  Coolant that leaks from the seal has a way to drip out through that port without putting any pressure on the oil seal.  It's common practice to lay in escape passages like that, even on car engines, anywhere the cooling system butts up against the crankcase.

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