I'm used to my 71 Westy but I couldn't pass up a deal.

I don't have a manual yet.

Where is great place to get inexpensive parts with great customer service?

Are any parts interchangeable with my 71 Westy.... CV joints?

Idles poorly and I noticed an oval air house that has a huge hole in it
running on top of the engine on right near middle going to black canister. ( I need
a manual) I wonder if this is the idle problem.

Exhaust pipe just before catalytic converter is broken, I'm assuming I can
just replace that one section of pipe?

Am I crazy to a tow a 550 LB motorcycle behind it every great once in a
while? 2.1 engine

Any tips are welcomed.
Thank you!