The Weber is a totally different carb. It hasn't really given me any problems. I also don't have to run a choke here because it's always pretty warm. The vacuum problems with the stock carb are pretty bad. I'm glad I never have to deal with them. My problem is the amount of oil that the engine is burning. I think it's the valve seals because it burns primarily while downshifting or going downhill and the compression is fine. It's probably a little quicker than stock, but slow none the less. I'd say an engine swap is the only way to go. The 1.6 from the Tracker/Sidekick is the easiest and the Chevy 4.3 is the beefiest.
http://bbs.zuwharrie.com/content
http://www.zukiworld.com/forum/index.php
http://www.izook.com/phpBB/index.php
There are tons of places to go for parts as well: Calmini, Petroworks, Rocky Road Outfitters, Hawk Suzuki Parts, Trail Tough, etc.
SO many things, so little money.