An 82' nighthawk 450 takes 2.6 quarts of of sae 10w-40 SE or SF grade oil... Although I've heard from friends who ride say you should get motorcycle oil or Honda specified oil. The nighthawks have a "wet" clutch system and regular car oil will burn out your clutch.. that's from a ATV technician..
How much engine oil does a 1982 Honda Nighthawk 650 take? 3.4 quarts
3.1 quarts
Just draining to change the oil = 2.6 quarts
1,000,000
12.75 .oz #10 fork oil 6psi pressure
left 15.7 right 15.2, 0-10 psi
about 12 hp
17
If everything is functioning properly, nothing is missing and the cosmetics are decent, then the bike should be worth around $1,100.
Depends on the engine
The 2014 Honda Civic's engine produces 129 ft-lbs. @ 4300 rpm.
The 2010 Honda Odyssey's engine produces 240 ft-lbs. @ 5000 rpm.