50cc air cooled cylinder kit.....where ti get one?

[JoePA]

I picked up a DRR 50 over the weekend but it needs a complete top end...I mean everything including the cylinder head. I found a few 70cc upgrade kits but the class that we run in has to be 50cc. Anyoneone know where I can find a kit cheap? Also once I tear into this thing I'll need some advice on a base line as where to start with the cvt as well as the carb.I got it in boxes so I have a million pieces to put together.

Thanks
Joe.