You can find a model lookup link on TSO.US.COM or click this link if it works

http://tso.us.com/parts-book/honda/0250nsr250/id-model/2-index/model-id.asp

I'm in the same boat as you are, I bought a half assembled bike and trying to finish it off. Maybe we can help each other as I have a bunch of stuff and debating on trying to finish a second bike or sell of the remaining parts.

Regards,
Paul
Watertown CT US