The real reason that it seems like the Triumph twins should have another gear is that it just doesn't seem right for it to be able to pull so well in top gear.
I have seen 115 MPH on my America with more throttle to go, so they will deliver the power you are looking for. They also handle much better than a Vstar. The mechanical design is great, as is the build quality. The styling will have people stopping you on the street with compliments.
