http://item.taobao.com/item.htm?id=13385655225.
You need the flat (平) top piston. No SAI hole (Special order) barrel also avaliable.

http://www.motorfans.com.cn/bbs/view...uthorid=108220
That "Fatty" is the 1st batch customer of that BBK. He fixed that SAI hole "#14" by some scarp metal & A/B epoxy thingy. http://chinariders.net/showthread.php?t=12810 Handwriting Feature available in Google Translate

spencer2004's kit is oreded from taobao , send a PM / search his old post for details.

If orders from TB, you may also consider the 17T http://item.taobao.com/item.htm?id=13251484918 (Not avaliable from JT Sprockets. Spencer2004 sells this product in fleabay occasionally)