Mugen, Maximo hasn't had the chance to run a .28 yet thats all, so the only comparison graph he has was a modded .25 he did to a stock Ninja.

One thing that you are forgetting Maximo when you compare timming and porting and stroke with the Go engines is the piston. The pistons are very slick because of the material used, and that is one reason why i believe the .21 show such great performance on or off the dyno.

Maximo do you know how many ports are in a Picco, that is another cost contributing factor in the engines as well, the more ports the more cost.