When you order the x-cal tell them what you want to set it at. If I'm not mistaken the canned SCT limit is 4100 max in Neutral.
I've got mine set at 5000 and it'll rap nicely now.
Also, the speed limiter on the newer models *I think* drops ignition per cylinder. The more the speed the more cylinders get dropped.
Got mine turned off. Doesn't matter to me though cause the fastest I go is mid 90s through the traps.