if you change to lower numerical gears, RPM's go down, not up, and regardless of what ya do, yer right foot controls the RPM what counts is how much weight you plan to carry and what kind of sustainable top speed you'd like
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics