I would run some cheap 30 w from dollar store to flush it out more. Then take clutch apart and clean all clutch disc. Don't want milky oil on them. That is why clutch is slipping
I know your daughter would what you to finish this bike rebuild. It would make her proud, but more so, I think it would have more of an effort on you. Please show pictures when it is finished. I think this will be good for you.
Do you know of anyone running the nologoy plug wires. Need to know best plugs to run with them. My goal is the get 250 hp/9's in the 1/4/ and top speed of 165