What weight oil does a 1983 Honda Nighthawk 650 take?

T

Thundercock

New member
I started it up for the first time in over 3 years today and it is smoking like a son of a gun. I am assuming that old congealed oil needs to be replaced. What weight oil does it need? I have a boat load of 10w-30 but I can't find out of thats what it takes. Thanks!
Guys, it's an 83. There is no warranty and there is no manual at all. Thanks for the answers. I will get it done tonight.
 
There is on warranty on a 83 CB650. But motorcycle oil is suggested. They put things in some regular oil that prevents friction. Problem is that a MC clutch uses the same oil as the case so that anti friction stuff causes the clutch to slip. 10W-30 or 10W-40 I think. I would just get it from the Honda shop when you pick up the filter. Don't forget to change that at the same time.
 
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