Well I took apart the carb (bing 14mm), the clip on the pin had gotten bent and the pin/needle was not properly engaged. Challenge is that it's still not running properly. I do think it's an issue with fuel/air mix though not the clutch.
Best performance at WOT and acceleration seems to be a 74 jet, but I cannot get the idle to function properly. I'm thinking it's possibly a bit rich at idle so I'll try lowering the pin a notch.
Honestly I have no idea how to get this thing tuned in. There's just so many variables at play on these old bing carbs. I can't even really tell when it's lean or rich - any suggestions for tuning in the idle?