What's painful to see in the above stuff is people still saying large direct-drive means bigger batteries and/or lower efficiency.
If done right, it IS the most efficient period. This means smaller battery if you choose to have the same range.
so your saying you dont need more battery's, even when the motor is heavier so if you have a bike that has a 10kw motor fitted and is running very efficiently but then change the 10kw motor for a 50kw motor and matching controller ( for better acceleration ) and top speed is unchanged your saying that you will get exactly the same range from the battery's ?
No you do not need more batteries. As we have said you pick your pack for range no peak amp draw because when you get decent range you have more then enough amps available.
BOTH BIKES weigh more adding a transmission adds weight as does using a bigger motor but fore a very small increase in motor size you get HUGE gains in power then you do need a bigger controller. But as Luke points out this makes a more efficient system then a transmission because the motor will not be stressed most of the time.
Its really amazing how many pages of going back and forth on this people can go though and not get it. BIFF and Chalo both pointed out there is times either will be better but in the end if you have a choice to add a bigger motor or a tranny and all other things aside why is it so many think a transmission is a better way to go??
I see it like this a bike with no motor and just a transmission can not move
A bike with a motor and no transmission can work fine. So by this math in most cases transmissions are dead weight/drag on the system.
Transmissions will have a place like behind a ICE where there is 0 torque at 0 rpm but its just non sense if you have the option of a bigger motor/controller.