I had the 450 dynoed today.
57.0 HP
Wossner 11.8:1 piston kit, 8 thou off the base of the barrel to achieve approx 13.0:1 CR, 570 cam, Barrett end cap on the muffler, seat and radiator shrouds cut back to open up the airbox.
The first run was done with the standard FX ECU. It achieved 57.0...