I see some 4-stroke engines listed with 4000 max RPM, and some all the way up to 5000 and 6000 RPM. Are there any with top speeds in the 2800-3000 RPM range that still have some torque down to 800 RPM? If my memory serves me correctly on old engine theory, a rather long stroke would be needed for such an engine. I don't know if something like that currently exists in a small enough package to mount in a bike frame.
Thanks,
andy b.
Thanks,
andy b.