It might also be a good idea to clean out the carbs after you get it all fixed up and while the tank is still off.
Yea I thought about cleaning the carbs but not quite sure how to do so. Anyone have a write up or know how to do it? I heard it shouldn't be too hard but I don't know. And yea I need to find a shop that carries the fuel filter. I'll be looking around this week.

Aye, it's fairly straight forward to clean out the jets on the carbs. I'll dig out an old set of carbs for some pics and point out what's what. First you'll need to get them off the bike though.
Tank's off already, next is the airbox. You'll need to undo the sub-filter which is the small black box attatched to the main air filter, (while this is off, it might be an idea to check the filter inside - they tend to rot and turn into dust. You can replace with any foam of a similar density). The California models are slightly different so not sure if you will have anything else to take off.
Next; Unclip the wiring loom and plug leads from either side of the airbox. It's a good idea to get pics of how they all go and, if not done already, label each plug lead.
Remove the lid of the airbox by undoing the screws around the outside, these can be a bit tight so use yer best driver on them.
Remove the element and undo the bottom part of the filter box by the two bolts. Remove the pipes connected to the airbox and take off the lower part.
Undo choke cable clamp and remove cable.
Loosen the intake jubilee clips and pull the carbs back.
Loosen the adjusment on the throttle cables and remove them from the carb body, (bit fiddly).
Remove the fuel feed pipe.
Your carbs should now be free to remove.
I've got the CB-1 Workshop manual in pdf format here, it has all the info you will need, how can I get it to you?