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-   -   Ram-air Effect/Petcock Vacuum (https://cbrforum.com/forum/street-fighters-105/ram-air-effect-petcock-vacuum-142606/)

Ls1Mx5 10-13-2012 06:43 PM

Ram-air Effect/Petcock Vacuum
 
I've heard that without fairings on my Cbr600f2 I will experience a ram-air effect that will cause it to run lean. To fix it, someone suggested taking the float chamber vents between carbs 1&2 and carbs 3&4, attaching them to a tee and running it into the airbox through a hole drilled in the underside just large enough to pass the hose through tightly. I want to do this correctly so I have some questions.

Also, I was told by someone else that the cylinder 1 vacuum line should attach to the petcock and the cylinder 2 vacuum line should be capped. Right now the cylinder 1 and 2 vacuum lines are tee'd and that tee line leads to the petcock. How should this be?

Here are the pics:

The two lines in this pic that are horizontal over the carbs are the ones that should be tee'd and brought to the air box right?
https://lh6.googleusercontent.com/-m...1312173945.jpg

This is the vaccum from cylinder 1 I was referring to
https://lh6.googleusercontent.com/-g...1312174035.jpg

Here's the tee that connects the vacuums from cylinder 1 to cylinder 2. The other end goes to the petcock
https://lh3.googleusercontent.com/-G...1312174055.jpg

I plan on drilling the hole in this part of the airbox between cylinder's 2 and 3. Is this a good spot?
https://lh6.googleusercontent.com/-k...1312174249.jpg

Thanks a lot in advance to who ever helps. Sorry for my dumb questions


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