@jjdpowell So to confirm then, with the valve pinned open, it has no bottom end (Which is what I'd expect) but it didn't pull hard 6K to red line.
Are you sure this is the correct CDI for your bike?
The round carb slide isn't the best, although it shouldn't be terrible.
It could just be worn electrical system not providing a healthy enough spark. For now you want to leave the carburettor settings alone, but rasther giving the carb a good clean.
The fact that the ignition system worn out leads me to think there is an underlying issue with the electrical system. Unfortunately it's a case of replacing the ignition system one item at a time to determine the source of the problem
The good news is, all these parts can be "Uprated" rather cheaply.
Starting with a decenet iridium NGK Plug. (BRE8S) I believe.
If it's still poor then you could try the HT Lead. NGK do a "Racing" Replacement. I put these things in quotes because this is what they claim, but when I've replaced them I haven't noticed a difference.
IF that's not it then you could try replacing the coil windings. There are some "Uprated" coils on the web.
All of the above should not cost you more than £30 to replace.
If they haven't solved your problem then it's something else. But those parts would need replacing in due course time anyway.
