I have the tank and air box off of my 1998 Tourer. Looking around, I see a lot of old looking rubber goods. What should I look at replacing? I have already ordered fuel lines, but what about vacumn lines and such. Also, do you need to go to Honda for these lines or can I go to the local auto store? Any pointers on changing some of these tubes would be appreciated.
Any of the vacuum lines could be hurting you, so it is worth putting new ones in there.
The chrome runners from the carbs to the top-ends have O-rings under them.
It wouldn't hurt to replace those O-rings either, particularly if you see "tobacco stains"
around the base of the runners.
Here's the pointer - if you have a hard &^!!%$! time getting your hands in there to
work, it is a lot easier to get in there with one or more runners removed.
If you remove any of them, having new O-rings to replace the old ones is good for
avoiding possible do-overs.
Some people "desmog" their bikes, which removes some vaccum lines. Some
people change out the vacuum operated petcock with ones that aren't vacuum operated,
which removes a vaccum line. Unless you've owned your bike since new, you'll have to
sort out whether any of that has been done...
I haven't replaced my fuel lines... the "other" (non-petcock) end of the fuel line
might be hard to get to...
I replaced my carb drain lines last winter... it won't make your bike run better (like
vacuum lines might) but mine were rotted and icky... all that stuff is routed
"on-purpose" so take your time... and maybe even some "before" pictures...
Let us know how it goes

-Mike