You can buy a similar 904 kit with nikasil plated (not sleeved) barrels from D&D Cycles of Pensacola, FL for only $895. (they swap with your barrels). They did my whole installation with multiple dyno runs and tests for a total of $1250.00 included dyno runs, parts, and all labor.
I've been very happy with mine. They offer higher compression pistons for the same price (I stayed with the standard Wisco). My goal was maximum torque throughout the 3-6K range. I'm getting 75 Hp and 66 Ft. Lbs. of torque. The best part is that at 5250 rpm (where your torque and Hp cross) they are both at 60. Major difference from stock and worth every penny.
D&D Performance
