Sounds like you're running too lean without the air filter. My guess is once you get the filter on it will run fine.
Loosen the bolt (10 mm?) tap the adjuster a few times and tighten. It's a spring loaded adjuster so it automatically adjusts. The bolt just locks it in-place and the tapping is to free it up. But I doubt that's your problem. Sure you got the correct heat range plugs, points gapped correctly, and coils polairity is correct. Are you sure the main jets are clean in those carbs?sojerscraper said:check the cam chain adjustment too. from what i remember, its pretty easy to adjust.