Crank case breather options.

OK,
This has been brought up in the past and I thought I could just make this post to give you ideas of what we do.

This is the "mod". If you only have a slight amount of oil in your airbox and want to reduce or eliminate it this works pretty good. For higher RPM operation not so much, but good for more aggressive riders not totally spinning it up.

It is a 77mm tube stuck on the end of the breather inlet.

Pretty simple and actually works OK.

The next is the big cahoona. This takes the breather tube and re-routs it to the rear of the bike to atmosphere, and plugging up the hole in the airbox.


Remove vent hose from airbox and cylinder head.



Stick 1/2" fuel line (tough and does not kink) into cylinder head hole and route up under tank.



Plug hole in airbox. I used the insert for a 5/8" barend, cut off and plugged with silicone.
The hose needs to run up under the tank as high as possible, then back down either in the front of the bike, or out the back down where the carb vent lines would normally go.

I will post the finished pictures when I can.... My garage is quite cold.