No difference in the head unless it's an XFI head, then the cam would be special for high mileage. You need the rounded tooth sprocket.
>would be good to have those high performance whose are selling every where<
Wow, going to have to guess here, but sprockets with advance built in and cams with either high performance or high mileage characteristics are available from 3Tech, he knows more about the Suzuki G10 than Suzuki does.
http://geometroforum.com/pages/3Tech