I'm wanting to replace all my vacuum lines, i recently swapped in a JDM SOHC ZC non-v (jdm version of a y7), and im still having some problems which im 99% sure has to be a vacuum line. The reasoning behind this is that the only parts i reused after the swap were the Intake mani, and vacuum lines.

So what im asking here is -
What are common places or parts that can develop vacuum leaks?
Also, where can i buy a set of new vacuum lines since it wouldn't hurt to replace them all anyways?
I typically get all my parts from majestic honda, but its hard to locate all the vacuum lines on their site and i think they might not even have all of them, so where can i get new hoses?

 

I'll be honest the lines hardly ever leak. I'd check the intake manifold for leaks. You can spray some carb cleaner around the intake manifold and see where the idle changes to find your leak. What exactly is the issue? But if you do replace the lines just go to an auto parts store and buy the lines by the foot.

 

I would go with this. If you aren't having any idle problems, etc. I would just let them be, they aren't really a wear item and if one ever does start leaking, it won't cause catastrophic problems.