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jscottyk 11-05-2010 06:44 PM

crankcase breather?
Maybe I'm being bone headed and/or lost (wouldn't be the first time) among the various EPA mandated hoses, but I can't seem to locate the crankcase breather.

Can someone point me in the right direction?

jscottyk 11-06-2010 09:25 AM

1 Attachment(s)
It's all out there on the interweb... sometimes you just have to dig.:wink:

So, it appears the F800 motors do not vent directly out of the crankcase. Rather the crankcase vents somehow through an internal path and ultimately out of valve cover (#3 in drawing). The valve cover connects a crankcase breather hose (#2 in drawing) to the bottom of the airbox.

jscottyk 11-06-2010 09:38 AM


That is a gold mine! Thanks for the reference AlanI.

jscottyk 05-20-2013 07:52 PM

Considering the drawing above and Oso Blanco's pictures below, can anybody comment on the path of the crankcase venting?

dpm 05-20-2013 11:13 PM

through the cam chain duct, as well as any oil return passages.

jscottyk 05-21-2013 05:05 AM

Thanks dpm!

ebrabaek 05-21-2013 05:51 AM


Originally Posted by dpm (Post 21454617)
through the cam chain duct, as well as any oil return passages.

I second dpm's motion.....

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