breather hose question
Posted April 27, 2006 - 08:40 PM
Does it suck all the time? My buddy, who does not yet have the breather rerouted on his YZF450 followed me through a 2 foot deep stream yesterday, and as he was riding away his bike stalled. Did he suck water into his engine, or is that only a problem if you stall in the water? He started it after a few kicks.
Also, which lines from the carb need to be rerouted to the airbox? Thanks
Posted April 27, 2006 - 10:08 PM
If you're talking about that one which comes from the cylinder head it doesn't suck at all. When idling you will actually notice air coming out from there. This air is caused by piston going down and "compressing" air in the lower engine. Also if you engine is very lose it will breathe thru here. Only place where engine sucks air is from airbox. The whole concept of "breather" hose is bit misleading
Posted April 27, 2006 - 10:12 PM
Posted April 27, 2006 - 10:16 PM
No harm as long it doesn't take water from the airbox.
With some speed you should easily be able to drive water line almost at the seat level (with standard airbox).
If the engine is able to keep oil in, it will keep water out too
Posted April 28, 2006 - 01:54 AM
Have a close look at the oil, if its mikly, it has water in it.
Posted April 28, 2006 - 05:37 PM
I routed one carb vent from each side into the airbox and left the others alone. If all 4 carb vent lines go under water it can stall. It happened to me in the middle of a knee deep puddle before I rerouted them.