Hey guys, I want to do the crank case vent mod.. The restrictor on my bike is at the inlet at the airbox.. I put in a small drill bit and the hole is too small for the drill bit to go through..

I was reading a bit and saw that there are two ways to do this mod...

Either drill out the restrictor or Seal off the inlet at the air box and run a new hose from the vent to the top of the airbox (under the seat) and put a small filter at the end..

I want to know which hose will fit out of these two:

3/8"
Click Here

1/2"
Click Here

Which of these two hoses will fit the outlet?

Oh and by the way, will I see any power gains by doing this mod? If so, what kind of gains?

Thanks,
Jamie