My 400K3 is above 300 miles now. I took it out on I-10 last week.
It has usable reserve torque at 65-75mph and it could still accelerate away from flanking gawkers that assumed I was there just for a show.
If I lean back on the drivers backrest, the wind noise below 85 is nearly non-existant.
While braking-in the 400 below 55mph, the RPM's swung quite freely from
1500 to 4800.
Once the 400 was cranked above 70mph on the interstate though, the RPM's settled back
down below 6,000.
I'm anticipating 200+ miles of range per each 3.5 gallon tank while touring in a few weeks. I'll let you folks know.