Johnf3
0
2008 450 EXC. No fan installed. Bike is motarded.
While riding on Sunday I saw antifreeze here(see pics). Not a lot of it, but certainly enough to notice.
How concerned should I be? It was before noon, so not the hottest part of the day. We had been riding at elevated speeds and earlier in the day I had to sit at a light and thought I could smell antifreeze.
The water pump casting, where your leak is, on your bike has a "weep hole". Anti freeze will leak out of the hole whenever the water pump seal fails. Most likely your outer WP seal has failed. It is a fairly common occurrence of your model of KTM. It is not a difficult repair if you know how to extract a seal and drive a new one in properly without damaging the new one.
Your bike does not hold much antifreeze to start with. Even a small leak like what you have can cause you to be short on coolant in a short time period. These motors are pretty tough but heat abuse will take its toll.
In your last picture, you can actually see the indentation of the weep hole from the side. It is right in front of that bottom bolt. You can do an easy visual inspection, but since you posted nice clear close ups, I would say from my view 350 miles away that you need to replace your outer WP seal.
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