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Engine blow by

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How much blow by is normal on these bikes? When it's running I can feel the air moving at the vent tube. After a ride it drips some oil out of the tube.

Is that normal?

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Completely normal. Do a search, it's been covered many times.

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Thanks for the answer. I tried the search but came up empty- probably not using good search terms.

Most of my engine experience is with cars and my street bike that are multi-cyl and have crankcase recovery vents. This open venting is a little new to me.

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It can be a little messy if you have a skid plate. Some guys run them back so it drips on the chain while others run them to their airbox because if you stall during a water crossing it can suck water up while kicking it. One guy ran it up in front of the gas tank and put a breather on it.

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Mine does exactly the same...when I bought it, previous owner had run it up over the airbox...oil everywhere! I ran it down to the skidplate , finally rerouted so it aims at my chain, might as well make use of the drips. Just noticed today how much air shoots out of there, too!

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