rpm

ok so when I get to this point, how do I get inside? I see where everything disconnects.

So today i took my bike to work and it was riding great, while working it started to rain a bit so i had to go home. As i pulled away and began accelorating then suddenly the rpms dropped to zero and then right back up to where they had been before, it did this in 2nd and 3rd gear a few times...

This bike has been coastered for years and ran great. Then life got in the way and the poor thing sat in a garage for many months. Had some seafoam in there but failed to run it as often as I should have. Long story short I just got done cleaning and re-installing the carbs. She now runs well...

Guys I really need you help on this one. Been troubleshooting every day for like two weeks now. It idles fine, and if I can get it over 5K RPM's it'll handle the freeway just fine. The moment it hits 4K RPM's it starts sputtering. Once that begins it'll continue until I get it over 5K or I can...