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TTR125 crankcase breather... where?

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Is the crankcase breather on the TTR125LE supposed to be routed out the bottom of the bike? Why doesn't it go to the airbox? Seems like it could suck in dirt this way.

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Mine is routed to the airbox. There's a hose connector on the bottom of the airbox the hose goes to.

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The crankcase vent tube comes out from the crankcase directly below the carb and is routed between the swing arm and frame along with all the overflow tubes and vent from the carb. As far sucking in dirt, that shouldn't be possible, as with the bike running the blowby pressure from the engine blowing from the tube would make it impossible. You are comparing this to the PCV system on an automobile where crankcase blow is re-routed back into the intake system to recycle unburnt hydrocarbon emissions (less pollution) which is not as big a concern on a dirt bike

Edited by mortiky

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