When I go back for my 1000 mile check, I'll ask them how their average dyno results differ between the two pistons. They gave me the impression that the reliability would be the same. I'm really happy with the performance gains with their standard 904 kit. It's a MAJOR difference from my 790 which they had tweaked with carb mods and pipes. After 1000 miles I'm anxious for them to do some additional tweaking, but I don't see myself going any further with this bike and performance mods. Even riding 2-up I probably can outrun my friends that have Road Kings and Soft Tail Deluxes. With the additional torque the bike has tremendous throttle response and quickness it didn't have before. I haven't been able to ride this week and need another 200 miles on it before running it to red line and really seeing what it can do.
