could you reference your sources? I've found that that is not true at all, as I've been in direct contact with motorcycle owners using the ADC A00, A89 and K91 motors and NONE of them use a ratio that high. Thats also a reason the eteks overspin and overheat, because they're spun too fast and don't have adequate cooling. It can't be spun lower because of its torque limitations (32 ftlbs, compared to my 50+). Also, the HP is 15, mine maxes out around 19 or 20. The rpm maxes out around 3400RPM, mine is above 5000. Its got a much wider power band, better cooling (built in fan) and completely rebuildable.
long and the short of it, its got more guts than the Etek, so I can't really go on what chain/ratio other people used. And don't worry, I did weight/torque/acceleration calculations before I decided on this, while its not going to be what the original bike gave me, it will give me great acceleration, great range and good high speed. I think most of the bikes as a compromise > between acceleration and battery range are more in the 5:1 to 6:1. >
