1983 GS650GL - Cleaning carbs question

[JonnyC]

That is to prevent them from rattling with the pulses of intake air.

.

Sweet, thanks for the info!

[Josh Riemann]

Hey guys, I have some more questions in a video I just made. It's 6 minutes long and has about 10 questions in it.

(In the video):

Question 1: What is weatherstripping for the airbox?
Question 2: (The hole is called the emulsion tube). Is resistance in emulsion tube important, and should the needles be cleaned and how?
Question 3: Are the gaskets bad?
Question 4: How to clean the floats (and should I?)
Question 5: How to clean the choke and bowl jets since they have rubber on them?
Question 6: Where to get replacements for vacuum and fuel line? How is the size and type specified.

Bonus questions:
Question 7: What is that cap, and why is it loose, how to get it off?
Question 8: What is that rusty bolt (and how to clean it)?
Question 9: How to clean the oily gunky residue off the engine heat sinks?
Question 10: What is going on on the crankshaft, and can it be cleaned?