86 200x front sprocket question

[Ant2u]

I am in the process of replacing the sprockets and chain on my 200x. I bought aftermarket sprockets and a chain off ebay. I was replacing the front sprocket today and the sprocket that came off the front has a shoulder on it and the new one doesn't. Did I get the wrong sprocket? Should I just install it, or try and shim it with a washer, or see about getting another sprocket with a shoulder? Here is a link to a web page with pics.

http://web.me.com/antwz/Ants_ATC/Ants_ATC.html

Thanks,
Ant

[super90]

Theres nothing wrong with either of them. Dont even need a washer.

[Ant2u]

Okay, thanks. I just installed it and it works like a champ.