Pull the filters for cleaning, use caps for carbs, rubber plugs or corks for the exhaust. Dialectric grease in every connection. Feel free to hose it down at that point.
Damn, 140 is a decent jump. What type of spring and weight? That motor above that I did the clutch on, I just couldn't seem to keep it totally clamped and still get it set up for slip on the start.
Never had a problem keeping it locked up on 7 plate set ups with less. Assembled a 10mm supercub for a guy and it didn't start slipping on the dyno till it got to about that point. Any more weight on the lock up and it wouldn't work in a race the way we wanted.
Tight is good. After new bushings and grease they should almost float in the air wherever you let go of them. Definitely don't over tighten them though. That usually results in stripped nuts.