Parts for the Hawk 250cc

[bostonian]

Does anyone know where to get parts for the Hawk dual sport enduro 250cc?

I found on another post here with a link to the carburetor for this bike on ebay and I am going to order that but I also wanted to change the front and rear sprocket to gear it a little better for the road. I haven't gotten the bike yet so I have nothing to compare it to and I don't know what size sprocket this bike will need.

Also does anyone know what size oil filter it will need?

Thank you for any help