83 500XC Chain question

Hi;
I put off the 'simple' things till last on the restoration of my 1983 500XC, and as this bike came to me without a chain, I thought this would be a simple thing to get, so I saved it for one of the last things to do.
That information is not easy to find, so I will ask somebody who knows. What size# chain does this bike take? I was told it should be a 530, non o-ring with @112 links. I'am sure this is a easy question for lots of you on this forum. Thanks in advance. Jaxpc.

Most chains for these open class bikes are retro fitted with 520 chains. O-ring or non o-ring is your choice.
Play it safe and order a 520 with 120 links and cut to size needed. Make sure to buy extra master links for that specific brand.

I almost typed the same thing without the word retro. 520 means five eights pin to pin two eights thickness. 530 is #50 industrial dimentions three eithts thick at the sprocket opening. The last digit in some instances can mean a different roller diameter ie 532 is like 530 but little bigger roller. What I don't like and have been sold by husky shops is a front sprocket where they give you a washer and a sprocket because the origionals have splines sticking out from the centerline equal distances. Perhaps there is some other application which only has that splined protrusion on one side but I don't like it. I know some of my modern stuff has the kind of spline set up I don't like on these but at least the splines always contact the shaft the same even if not the way I like them.

Jaxpc I just got a 1983 XC500 and i could use any help you could offer to restore it.