what would be the best front and rear sprocket 4 an 05 honda i know that from 05 they are diffrent from older 400

 

What kind of riding you do would help determine the sprocket best suited to you.

 

As I recall, they went one tooth larger in front in 05 (????). Not sure what they did, if anything to the rear sprocket.

Front sprockets are realatively cheap, so the best thing to do is try some different sizes and see how you like it....provided you have enough chain adjustment available.

My experience on my 00, was that going one tooth smaller in front was to much (even with a change to 22" tires). It would wheelie way to easily, so the compromise I came up with was to go one tooth bigger in back.

 

Compare some different combinations:

http://pinnedoutracing.com/gearratiochart.aspx