I believe the power peak (not torque peak) is at 7250 RPM. If you want any bike's drag-limited terminal speed, you want to be geared to reach this peak power RPM right at the top speed.
If it's topping out at 6400 rpm in 6th (850 rpm below redline where the engine is probably down 6-8 hp or so from peak), this means there is probably more speed to be had in 5th. Or you may need to wring it out in 5th at or near redline to avoid the RPM dropping too much when you shift to 6th. (Some bikes won't reach their maximum speed simply by pinning it in high gear - drag climbs faster than power and they top out prematurely. To get past this barrier, you have to overrev them in 5th before making the last shift. I believe the S10 has an additional 500 rpm of overrev beyond the power peak although I don't know if the power simply plateaus or starts dropping precipitously.)
- Mark
If it's topping out at 6400 rpm in 6th (850 rpm below redline where the engine is probably down 6-8 hp or so from peak), this means there is probably more speed to be had in 5th. Or you may need to wring it out in 5th at or near redline to avoid the RPM dropping too much when you shift to 6th. (Some bikes won't reach their maximum speed simply by pinning it in high gear - drag climbs faster than power and they top out prematurely. To get past this barrier, you have to overrev them in 5th before making the last shift. I believe the S10 has an additional 500 rpm of overrev beyond the power peak although I don't know if the power simply plateaus or starts dropping precipitously.)
- Mark