It gets a lot of cover from my leg and I try and keep the covered chrome at top but no real effect on running. I have seen A65's run with open stacks in real down pours so a bit of moisture only saves gas. LOL!I have heard a1/10 mix of water and gas will still fire in a well set up bike. The carb is mounted on a 90 degree elbow sidedraft I made. Extra air for the mix, the A65 with girl on back is running them here with open velocity stacks.