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Water from exhaust

1.5K views 2 replies 3 participants last post by  jbiggers  
#1 ·
Is it normal for the bike to blow some water out of the exhaust on a cold start? I've never noticed it until today, I started it and there was water coming out of the pipes on the garage floor. It was extremely humid here today so maybe that was it?
 
#3 · (Edited)
Water vapor is a normal by-product of combustion of gasoline. It's just not too normal to see it coming out of the exhaust, unless it's cold or really humid outside. I've seen water drip from car exhausts fairly often, so no big deal, unless it's the color of the coolant, then it needs to be looked into.

One other thing, when you first start the bike, some of the water vapor condenses out against the cold metal. As the pipes warm up, it becomes less and less likely the water vapor will condensed out before it is expelled.