Having issues getting power delivery in gears past 1st, I'm thinking it might be the clutch, but before I get into that I'd like to hear some insight on it. It's not burning oil so I don't think that it's an issue with a cracked block, head or gasket. I have yet to test cylinder pressure to confirm that. I cleaned the carbs multiple times too. Just let me know what you guys think.

 

From the limited information sounds a bit like the clutch.

 

What did the oil look and smell like? You did change it of course? What oil did you use on that ride?