I made my own, found an old sprocket in work bored out the center a little bigger and cut and re-welded the new one to the axle. Gave me about 25-30 mph more. I do burn outs from a stand still now...........
The guys at Dazon also told me that they are working on a 35 tooth large sprocket. Currently, on my 2004 double seat Raider 150, it is a 31 tooth, but a double chain setup, which seems to be unbreakable. They also told me about the Wiseco pistons & rings @ the same time, and will be available around the first of the new year. The person I spoke with even faxed me a copy of the Wiseco test results, directly from Wiseco. I've got mine on order now and am looking forward to throwing some serious dirt at my Hammerhead & Carter buddies (sorry guys, but they will only fit on the Dazon engines).