Quote Originally Posted by Kennon View Post
breather pipes never fill up with fuel they are there to draft air into the tank when the fuel is being pumped out if its kinked it'll cause a lack of air meaning the pump can still keep pumping but only a very limited amount of fuel would get through, I had a fuel starvation problem with my bike at higher speeds where the suction was strong enough it would run fine but below 8K revs it would stutter allot.

Kennon
Previous owner must have removed tank and mixed those two hoses under tank. Started to notice that after i wash bike it had lot of water near fuel cap and once i opened it, all water went to tank.
So that is now fixed.
and lately symptoms have disappeared.