Split Hose, Part id?

[slinx]

Hi,

I've got a split hose which is shown in the middle of the pic, leading into the right hand side of the head. Whats the part (id or whatever) and where can i order it from (unless i have to go straight to dealers)?

Also it'd be interesting to know exactly what the part is for, and what problems it can cause.

Thanks.

 

[colinra]

hi,
looks like the crank case breather hose to me. shouldn't cause too much bother other than some oil escaping when the motor is running.